Take a woman we’ll call Elena. Most mornings she woke up with a mouth like a sandbox. Her dentist had told her three times that her enamel was eroding faster than it should. Her husband slept in the guest room three nights a week because the snoring had become a nightly event. She’d tried nasal strips, a humidifier, a wedge pillow. Nothing stuck. Then her sister, who works in sports medicine, mentioned two words that seemed almost too simple: mouth tape.
Elena’s first reaction was the standard one: that sounds insane. Tape my mouth shut while I sleep? Isn’t that dangerous? Isn’t that the kind of thing that shows up in true crime documentaries?
The second reaction, after twenty minutes reading the research, was: why hasn’t anyone mentioned this before?
Why You Breathe Through Your Mouth at Night (And Why It Matters)
Humans are obligate nasal breathers, evolutionarily speaking. The nose isn’t a cosmetic feature — it’s a sophisticated air-processing system with no equivalent in the mouth. Understanding what the nose does that the mouth cannot is the foundation for understanding why mouth breathing during sleep is genuinely a problem.
The nasal passages filter incoming air, removing particulates, allergens, bacteria, and viruses before they reach the lower respiratory tract. The sinuses and nasal passages humidify and warm air to approximately 98.6 degrees Fahrenheit and 95 percent relative humidity before it hits the lungs — precise calibration that maximizes gas exchange efficiency. None of that happens breathing through the mouth. Mouth breathing delivers cold, dry, unfiltered air directly to the airways.
The most significant function of nasal breathing, though, is one most people have never heard of: nitric oxide production. The nasal passages and sinuses produce nitric oxide, a signaling molecule with a remarkable range of biological effects. It’s a potent vasodilator — relaxes blood vessel walls, improves circulation. Antimicrobial properties. And crucially for sleep, it helps regulate airway tone. Nasal breathing continuously delivers nitric oxide into the airways, helping maintain the muscle tone that keeps the airway from collapsing during sleep. Mouth breathing bypasses this mechanism entirely.
Then there’s the airway mechanics problem. Breathing through the mouth, the tongue tends to fall back, the soft palate relaxes, and airway diameter narrows. This is the mechanical setup for snoring — the sound of turbulent airflow through a partially obstructed airway. Nasal breathing keeps the tongue in a more forward position and the soft palate elevated, maintaining a wider, more open airway. The difference in airway dimensions between nasal and mouth breathing during sleep isn’t trivial. It can determine whether a borderline airway stays open or collapses.
The Consequences of Chronic Mouth Breathing During Sleep
If mouth breathing during sleep were merely inefficient, it wouldn’t warrant much attention. The problem is it produces a cascade of downstream effects that compound over months and years into genuine health problems. Most mouth breathers never connect their symptoms to how they breathe at night, because the connection isn’t obvious. But it’s there.
Dry mouth and dental consequences. Saliva is the mouth’s built-in antimicrobial and pH-buffering system. It neutralizes the acids produced by oral bacteria, remineralizes enamel, and physically washes debris from tooth surfaces. Breathing through the mouth all night desiccates the oral cavity, wiping out that protection for six to eight hours straight. Chronic mouth breathing is directly associated with accelerated tooth decay, enamel erosion, gum disease. Dentists can often spot chronic mouth breathers on dental X-rays before the patient mentions their sleep habits. This is what was happening to Elena’s teeth.
Snoring and sleep quality degradation. As above, mouth breathing narrows the airway and sets up the conditions for snoring. But snoring isn’t just annoying to a partner — it’s a sign of airflow turbulence and partial obstruction that fragments the snorer’s own sleep architecture. Even snoring that doesn’t progress to full sleep apnea measurably reduces sleep quality by causing micro-arousals (brief disruptions that aren’t remembered) that prevent reaching deep sleep and REM stages.
Sleep apnea risk escalation. Obstructive sleep apnea — where the airway collapses completely and breathing stops for 10 seconds or more — is more likely and more severe in people who breathe through their mouths during sleep. The mechanical relationship is direct: mouth breathing reduces airway tone and increases the odds of full collapse. People with diagnosed sleep apnea who mouth-breathe while using CPAP machines also dramatically undercut the effectiveness of their treatment, because pressurized air escapes through the open mouth instead of splinting the airway.
Systemic inflammation. The filtering and humidifying functions of nasal breathing have downstream effects on respiratory and systemic inflammation. Chronic exposure of the airways to cold, dry, unfiltered air is an irritant that drives low-grade inflammatory responses. Over years, this contributes to higher rates of respiratory illness, allergic sensitization, and potentially broader inflammatory conditions.
Cognitive and metabolic effects. Fragmented sleep — which mouth breathing produces through snoring and micro-arousals — carries the same downstream effects as any other form of sleep disruption: impaired cognitive function, elevated cortisol, disrupted glucose metabolism, increased appetite and weight gain risk. Well-documented consequences of sleep fragmentation regardless of cause.
The Research on Mouth Taping: What the Evidence Actually Shows
The clinical research on mouth taping for sleep is younger than the practice itself, but several well-designed studies have now examined it with enough rigor to draw meaningful conclusions.
A 2022 study by Lee and colleagues (published in the Journal of Clinical Sleep Medicine) examined mouth taping in patients with mild obstructive sleep apnea. The results were striking: mouth taping reduced snoring frequency by approximately 50 percent compared to baseline and reduced the apnea-hypopnea index (a measure of airway obstruction events per hour) in the mild OSA group. In the subgroup confirmed as nasal breathers during wakefulness, the improvements were even more pronounced. The study specifically noted the intervention appeared to work primarily by preventing the mouth-open sleeping posture that reduces airway tone.
A 2015 study by Teschler and colleagues found mouth breathing during CPAP therapy was a significant predictor of treatment failure, and that interventions encouraging nasal breathing — including chin straps and oral appliances — meaningfully improved outcomes. This study focused on CPAP users rather than mouth taping specifically, but it supports the underlying mechanism: closed-mouth sleep improves airway mechanics regardless of the specific intervention used to get there.
Earlier foundational work by Rappai and colleagues (2003) documented the mechanical relationship between mouth breathing and airway collapsibility, providing the anatomical explanation for why nasal breathing improves sleep-disordered breathing across a range of severities.
Worth being honest about the limitations here. Most mouth taping studies are relatively small (fewer than 100 participants) and short in duration (weeks rather than months). The research base isn’t as mature as the wellness marketing suggests. What can be said: the mechanistic rationale is sound, the evidence in mild-to-moderate snorers and mild OSA is encouraging, and the risk profile for appropriate candidates is very low.
“Nasal breathing during sleep is the physiological norm. The nose exists to serve the lungs. When we route air through the mouth instead, we are bypassing the entire upstream processing system that evolution spent millions of years building.” — James Nestor, Breath, 2020
Who Should and Absolutely Should Not Tape Their Mouth
Appropriate candidates:
- Adults who can breathe comfortably through their nose while awake
- People with mild snoring and no diagnosed sleep apnea
- People with mild to moderate OSA who have been assessed by a sleep physician and are not at risk of severe events
- People who wake with dry mouth, dental problems, or morning sore throat consistent with mouth breathing
- CPAP users who leak air through their mouth (as an adjunct to CPAP, with physician guidance)
People who should NOT tape their mouth:
- Anyone with moderate to severe obstructive sleep apnea — mouth taping does not treat apnea, and in severe OSA the risk of undetected respiratory events is significant
- Anyone who cannot breathe through their nose while awake (nasal polyps, deviated septum, severe allergic congestion, nasal obstruction)
- Children — do not tape children’s mouths for sleep without direct medical supervision
- Anyone who has consumed alcohol or sedatives — these relax the upper airway further, and obstructed breathing during this state can be dangerous
- Anyone with nausea, GERD, or conditions that increase vomiting risk — the risk here should be obvious
- Pregnant women should consult a physician before attempting
The critical prerequisite is simple: comfortable nasal breathing while awake, full stop. Can’t do that? Fix that problem first — see an ENT, address the allergies, treat the congestion. Mouth taping on a truly blocked nose isn’t a sleep optimization tool. It’s suffocation by increments.
Any reason to suspect undiagnosed sleep apnea — loud snoring, waking gasping, being told breathing stops — get a sleep study before attempting mouth taping. A sleep study isn’t a major ordeal. Plenty can be done at home now with a take-home device. Know the airway before taping it.
The Nasal Sleep Transition Protocol: A Framework
For appropriate candidates, the transition to nasal breathing during sleep isn’t a single-night switch. It’s a graduated process requiring both mechanical preparation (making sure the nose can handle the full load) and behavioral adaptation (building the habit of nasal breathing before it becomes automatic during sleep). The Nasal Sleep Transition Protocol is a six-step framework for making the transition safely and sustainably.
Step 1 — Nasal Clearance Assessment. Before taping anything, spend one week deliberately nose-breathing during the day. Uncomfortable or impossible? Figure out why. Allergies? Address them with a nasal rinse (Neti pot or saline spray) and consider an antihistamine if needed. Congestion? Elevating the head of the bed by an inch or two reduces nasal congestion during sleep by improving mucosal drainage. Structural issues (deviated septum, polyps) require ENT evaluation. Don’t proceed to mouth taping until daytime nasal breathing is fully comfortable.
Step 2 — Pre-Sleep Nasal Clearance Routine. A nasal rinse (saline or Neti pot) 20 to 30 minutes before bed every night. Clears accumulated particulates and reduces mucosal congestion that worsens in the supine position. Breathing through a clear nose during sleep is dramatically easier than breathing through a congested one. This step alone improves nasal airway patency enough that some people find they naturally close their mouth during sleep without any tape at all.
Step 3 — Tape Selection. Use 3M Micropore surgical tape (the standard recommendation) or purpose-made mouth strips like Hostage Tape or SomniFix. Do NOT use duct tape, packing tape, or any adhesive not designed for skin contact. The tape should be gentle enough to peel off easily mid-sleep if needed, which eliminates any claustrophobic risk. A small vertical strip (approximately 2 cm × 2 cm) placed across the center of the lips is sufficient to encourage lip closure. No need to seal the mouth completely — just a gentle prompt that trains the lips to stay together.
Step 4 — The Tolerance Test. Before the first night of taping, wear the tape for 20 to 30 minutes while awake and watching television or reading. Confirms comfortable breathing with it on, confirms easy removal, and removes the anxiety of the unknown. Most people find this immediately reassuring. The tape isn’t binding — a gentle breath through slightly parted lips breaks the seal in seconds if needed.
Step 5 — Graduated Nightly Use. Begin with the tape on for the first two to three hours of sleep, removing it if waking in the night (let the body find it naturally). Over one to two weeks, most people find the tape stays on through the night as the body adapts to nasal breathing. Don’t force it. The goal is behavioral adaptation, not mechanical compliance.
Step 6 — Assessment at 30 Days. After 30 nights, evaluate: waking with a dry mouth less often? Snoring reduced (ask the partner)? Feeling more rested? Morning energy improved? Yes across multiple indicators — the protocol is working. If not, check whether nasal congestion is still the limiting factor, or whether a sleep study is warranted to rule out moderate-to-severe apnea.
The Nitric Oxide Mechanism: Why Nasal Breathing Has Systemic Effects
The nitric oxide story deserves more attention than it usually gets in discussions of mouth taping, because it explains why the benefits of nasal breathing extend beyond the airway.
Nitric oxide (NO) is produced in the nasal passages and sinuses by the enzyme nitric oxide synthase acting on L-arginine. Inhaling through the nose, NO travels with the air into the lungs and bloodstream. Three functions directly relevant to sleep quality and overall health.
First, nitric oxide is a bronchodilator and vasodilator — opens airways and blood vessels, improving the efficiency of oxygen transfer in the lungs. Research has shown nasal breathing increases blood oxygen saturation compared to mouth breathing during equivalent workloads, because the NO-enriched air improves alveolar gas exchange. Better oxygenation during sleep means better tissue repair, better brain restoration, less stress response.
Second, nitric oxide has direct antimicrobial activity against a range of pathogens, including many viruses and bacteria. Partly explains why people who breathe through their noses are less susceptible to upper respiratory infections — the incoming air is being disinfected before it reaches the lower respiratory tract. Mouth breathers skip this step entirely.
Third, nitric oxide helps regulate cardiovascular tone. People with impaired nasal breathing chronically produce less NO, which is associated with elevated blood pressure and reduced cardiovascular health markers. Several studies have shown addressing nasal obstruction (surgically or otherwise) produces measurable improvements in blood pressure — a finding hard to explain if the mechanism were purely mechanical.
James Nestor, in his extensively researched book Breath (2020), spent considerable time documenting the nitric oxide mechanism and its implications for overall health. His central thesis — that nasal breathing is not merely preferable but functionally critical — is supported by the NO research in a way that makes the mouth taping question feel less like a fringe wellness hack and more like a basic hygiene correction.
Mouth Taping and Sleep Apnea: Getting This Right
Nasal Breathing Training: Building the Foundation During the Day
One of the less-discussed aspects of the mouth taping transition: nasal breathing is, for some people, a skill that has atrophied. Chronic mouth breathers — particularly those who developed the habit in childhood from allergies, enlarged adenoids, or habitual patterns — may find daytime nasal breathing slightly uncomfortable at first, even when the airways are anatomically clear. Functional issue, not structural, and it responds well to deliberate practice.
The diaphragm is the primary muscle of nasal breathing. Shallow chest breathing — associated with stress, anxiety, and sedentary modern life — tends to accompany mouth breathing and creates a feedback loop where the two patterns reinforce each other. Breaking it requires consciously engaging the diaphragm.
A simple practice: three times per day, five minutes breathing exclusively through the nose with deliberate diaphragmatic engagement. Inhale slowly through the nose, belly expanding before the chest. Exhale fully through the nose. Urge to open the mouth? Slow the inhale further — mouth-breathing urges during rest usually mean breathing too fast, not a genuine need for more air. The Bohr effect (the relationship between CO2 and oxygen release from hemoglobin) means slightly higher CO2 tolerance actually improves oxygen delivery to tissues, and nasal breathing is associated with higher CO2 tolerance than mouth breathing.
Patrick McKeown’s work on the Buteyko breathing method is the most systematized treatment of this topic. The Buteyko method makes some claims that exceed the current evidence base, sure, but its core observation — that many people overbreathe (breathe more than metabolic needs require) through their mouths, and that training toward slower, nasal breathing improves a range of respiratory and sleep outcomes — is supported by the research. Even a modest amount of daytime nasal breathing training meaningfully reduces the effort required to maintain nasal breathing during sleep.
The goal, within about two to three weeks of deliberate practice, is for nasal breathing to feel as natural and effortless during the day as mouth breathing once did. Cross that threshold and nighttime nasal breathing (with or without tape as a reminder) becomes automatic rather than effortful. Not fighting the body’s habits anymore. They’ve changed.
The Environmental Factors That Undermine Nasal Breathing
Low indoor humidity. Dry air (below 30 percent relative humidity) desiccates nasal mucosa, causing swelling and congestion that makes nasal breathing harder. Especially common in winter in centrally heated homes. A bedroom humidifier maintaining 40 to 60 percent relative humidity makes nasal breathing dramatically easier and reduces the likelihood of congestion-driven mouth breathing. Hygrometers (humidity meters) are cheap and worth having to monitor bedroom air quality.
Allergen exposure. Dust mites, pet dander, mold, and other bedroom allergens trigger inflammatory mucosal responses that congest the nasal passages at night. The most impactful allergen control measures: washing bedding weekly in hot water (dust mites), allergen-proof mattress and pillow covers, keeping pets out of the bedroom, addressing any moisture or mold issues. These changes reduce the congestion burden that forces people back to mouth breathing even when actively trying to nasal breathe.
Alcohol consumption. Alcohol causes nasal mucosal swelling (nasal congestion) that can persist for hours after drinking. Why plenty of people who drink in the evening snore more loudly and mouth-breathe more during sleep. The alcohol-nasal congestion-mouth breathing-snoring chain is well established. Eliminating or significantly reducing evening alcohol consumption is often as important as the tape itself for achieving consistent nasal breathing during sleep.
Sleep position. Side sleeping generally maintains better nasal airway patency than back sleeping, particularly with any structural nasal asymmetry (a common anatomical variant). People who preferentially sleep on their back and struggle with nasal congestion at night may find that simply shifting to side-sleeping resolves the congestion problem without any pharmaceutical intervention. A body pillow that prevents rolling to the supine position can reinforce this habit mechanically.
The relationship between mouth taping and sleep apnea is where the most potential harm lives, and it’s worth spending dedicated space on it because the wellness internet does not handle this nuance well.
Sleep apnea exists on a spectrum. Mild OSA (Apnea-Hypopnea Index of 5 to 14 events per hour) is meaningfully different from moderate OSA (15 to 29) and severe OSA (30+). The Lee 2022 study showing 50 percent snoring reduction was specifically in mild OSA patients who were nasal breathers during wakefulness. These results don’t extrapolate to moderate or severe apnea.
In moderate-to-severe OSA, the airway collapses completely during sleep regardless of nasal versus mouth breathing position. The problem isn’t just airway tone — it’s structural airway anatomy (excess tissue, retrognathia, obesity-related narrowing) that mouth taping cannot address. Applying mouth tape to a severe OSA patient who isn’t on CPAP isn’t a helpful intervention. It’s a risk that could delay diagnosis and treatment of a condition associated with significantly elevated cardiovascular mortality.
The safest approach for anyone with suspected sleep apnea is a sleep study first. Once there’s a diagnosis and a clear sense of severity, informed decisions can be made about whether mouth taping is an appropriate adjunct (mild cases) or irrelevant (moderate to severe cases, where CPAP or oral appliances are the appropriate treatments).
For confirmed CPAP users, mouth taping can be a legitimate adjunct if air leaks through an open mouth (a common cause of CPAP treatment failure). In this specific use case, tape or a full-face mask helps maintain the positive pressure that keeps the airway open. But this should be worked out with a sleep medicine provider, not decided from a Reddit thread.
What to Expect in the First Week
Most people new to mouth taping report a similar progression. The first night is often slightly uncomfortable, not from physical difficulty but from psychological novelty — the brain notices the tape and generates mild anxiety about it. Normal. Passes. Completing the tolerance test (wearing tape while awake for 30 minutes) before the first night significantly cuts this down.
By nights two through four, most people report sleeping through the night with the tape in place, waking less, and noticing a significant reduction in morning dry mouth. The desiccated sandpaper feeling chronic mouth breathers are used to on waking largely disappears. Saliva is present. The mouth feels normal.
Partners typically notice snoring reduction within the first week, often dramatically. This is frequently what motivates continued use — the feedback loop of a partner suddenly sleeping better because the snoring dropped is a powerful reinforcer.
By the end of the first month, many people report nasal breathing during sleep has become habitual — the body has adapted and the tape functions more as a safety net than a mechanical constraint. Some find they can eventually sleep without tape and maintain nasal breathing naturally; others continue indefinitely as a maintenance tool. Both outcomes are fine.
Addressing the Anxiety: Is Mouth Taping Actually Safe?
This is the question that stops most people before they start, and it deserves a direct answer.
For appropriate candidates — adults who can breathe comfortably through their nose while awake, without significant nasal obstruction, without moderate-to-severe sleep apnea, and without alcohol or sedatives in the picture — mouth taping with a gentle surgical tape or purpose-made mouth strip is safe. The tape used isn’t strong enough to prevent the mouth from opening if it needs to open. A moderate breath through the lips, a cough, a sneeze, or any strong exhalation breaks the seal immediately. Not sealed shut. Gently reminded to keep the lips together, a cue the body overrides effortlessly when it needs to.
The scenario that worries people — choking, unable to breathe — requires a simultaneous complete nasal obstruction AND a tape strong enough to seal the mouth. Neither condition is true here. If the nose blocks during sleep (common with colds or allergy flares), the mouth simply takes over, the tape breaks at the lips, and breathing continues normally. May not even fully wake up for it.
None of this applies to people with significant nasal obstruction who cannot breathe comfortably through their nose while awake. Nose that blocked — genuinely, no mouth taping. Fix the nose first. The protocol is quite clear on this prerequisite, and it’s the single most important safety rule in the entire guide.
For Elena, the first week with micropore tape was revelatory. The dry mouth vanished. Her husband moved back into the bedroom permanently after night four. The dentist at her next appointment commented, without prompting, that her enamel looked better than it had in years. Three years she’d spent trying nasal strips, which address snoring symptoms without touching the underlying cause. A roll of surgical tape and a two-week protocol achieved more than years of symptom management.
That’s not always how it goes. But when the underlying cause is mouth breathing, addressing the cause tends to beat managing the symptoms.
Elena’s story ends well, but it didn’t have to. If her dentist had caught the enamel erosion and recommended mouth taping without first establishing she was a comfortable nasal breather — without that two-minute prerequisite check — the story might have gone differently. The protocol works when the prerequisites are respected. Skip them, and this isn’t a health intervention anymore. It’s rolling the dice.
Do this right. Clear the nose. Confirm nasal breathing is comfortable. Start with a tolerance test. Use appropriate tape. Know whether sleep apnea is in the picture. These aren’t bureaucratic obstacles to the intervention — they are the intervention. The goal isn’t taping the mouth. The goal is breathing through the nose all night, every night, using the system evolution built for exactly that purpose.
For a broader approach to sleep optimization that incorporates nasal breathing alongside other evidence-based strategies, see the full Sleep Optimization Protocol. If the snoring might reflect something more serious, the guide to Sleep Apnea Signs and Solutions covers the diagnostic and treatment landscape in detail.
FAQ: Mouth Taping for Sleep
What kind of tape should I use for mouth taping?
3M Micropore surgical tape is the most widely recommended option — inexpensive, widely available, designed for skin contact, releases cleanly without residue. Purpose-made mouth strips (SomniFix, Hostage Tape, Myotape) are also well-designed and offer the advantage of a shape calibrated for lip application. Do not use duct tape, packing tape, or any household adhesive not designed for skin contact. The tape should be gentle enough to peel off in sleep if needed.
Will I suffocate if my nose gets blocked while the tape is on?
No. The tape used for mouth taping isn’t strong enough to seal the mouth against a moderate exhalation. Nose blocks during sleep, the mouth takes over, the tape seal breaks, breathing continues normally. May not even fully wake. This is why the lips are taped, not the entire mouth — a gentle breath breaks the seal immediately. Seriously concerned? Start with only a small central strip rather than a full lip application for the first few nights.
Can mouth taping cure sleep apnea?
No. Mouth taping can reduce snoring and improve symptoms in mild OSA where mouth breathing is a contributing mechanical factor. It doesn’t treat the structural airway anatomy that drives moderate-to-severe obstructive sleep apnea. Moderate-to-severe OSA, confirmed or suspected — CPAP, oral appliances, or surgical intervention are the appropriate treatments. Mouth taping in that context risks masking symptoms while a serious condition progresses untreated.
How long does it take to see results from mouth taping?
Most people notice reduced dry mouth immediately (first night). Snoring reduction is typically reported by partners within the first week. Improvements in sleep quality and morning energy take two to four weeks to show clearly, as the body adapts to consistently more efficient sleep architecture. Dental improvements (reduced enamel erosion, better morning oral pH) are visible to dentists over months, not days.
Can children mouth tape for sleep?
Children should not mouth tape for sleep without direct supervision from a pediatric sleep medicine physician or ENT. Mouth breathing in children often reflects underlying structural issues (enlarged adenoids, tonsillar hypertrophy, nasal obstruction) that need treatment, not management. Mouth taping a child without addressing the underlying cause is both inadequate and potentially risky. A pediatric ENT evaluation is the appropriate first step for children who chronically mouth-breathe during sleep.
Does mouth taping help with bad breath?
Often yes. Chronic bad breath (halitosis) in the morning is frequently a consequence of dry mouth — the absence of salivary antimicrobial action during the night lets bacterial populations proliferate on tooth surfaces and the tongue, producing volatile sulfur compounds. Maintaining oral moisture through nasal breathing significantly reduces this mechanism. People who switch to nasal breathing during sleep typically report dramatic improvements in morning breath within the first week.
What if I feel claustrophobic with tape on my mouth?
Start with the awake tolerance test before attempting to sleep with tape. Sit with micropore tape on the lips for 30 minutes while watching something engaging. Most people find the anxiety dissolves within a few minutes once comfortable breathing and instant removal are confirmed. Claustrophobic feelings persisting strongly — consider the Myotape product, which encircles the lips rather than sealing them, encouraging lip closure without any sense of sealing. Or address the underlying anxiety first through progressive relaxation or breath training.
Should I still use a nasal rinse even after I’ve been taping for months?
A nightly saline nasal rinse is worth maintaining indefinitely with any history of allergies, congestion, or sinus issues — not just during the transition period. Clear nasal passages make nasal breathing during sleep substantially easier, reduce the risk of reverting to mouth breathing during allergy season, and have independent benefits for sinus health and upper respiratory immunity. Takes about two minutes, costs almost nothing.
The Practical Framework: Applying Mouth Taping Sleep Evidence In Real Life
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