8 Benefits of Sleep Masks for Better Sleep Quality

Do sleep masks really work? Our data says "yes."

One of the best things you can do to improve the quality of your sleep may also be one of the easiest–just wear an eye mask to bed. Below we'll explore how sleep masks work, their potential benefits, what to look for in choosing one, and the positive impact they have on WHOOP members' sleep data.

How do eye masks help you sleep?

The basic premise of a sleep mask is very simply to block any light from reaching your eyes. Exposure to light when you're trying to sleep confuses your circadian rhythm, the body's 24-hour internal clock that regulates sleep patterns. "Our circadian rhythms are essentially set by light," states Emily Capodilupo, VP of Data Science and Research, on the WHOOP Podcast. "If you have even very small amounts of light in your bedroom you're pretty much telling your body it's daytime, which means don't sleep, and you actually inhibit the production of the sleep promoting hormone melatonin."

8 benefits of sleep masks for better sleep quality

When WHOOP members report wearing a sleep mask there are substantial improvements in their sleep and next-day recovery. On average, their total time asleep increases by 27 minutes, they see a 2% gain in REM sleep, and their recovery is boosted by 9%.

These improvements translate into measurable benefits across multiple dimensions of your health and performance. Here are eight ways a sleep mask can enhance your sleep quality:

1. Blocks light to support melatonin production Even small amounts of ambient light can suppress melatonin, the hormone that signals your body it's time to sleep. A sleep mask creates complete darkness, allowing melatonin levels to rise naturally and helping you fall asleep faster.

2. Increases total sleep time By eliminating visual disruptions throughout the night, a sleep mask helps you stay asleep longer. WHOOP data shows members gain an average of 27 additional minutes of sleep when wearing a mask.

3. Enhances REM sleep REM sleep is critical for memory consolidation, emotional regulation, and cognitive performance. Sleep masks help protect this stage from light-induced interruptions, with WHOOP members seeing a 2% increase in REM sleep.

4. Improves next-day recovery Better sleep quality directly impacts how your body recovers. WHOOP members who wear sleep masks see an average 9% boost in their Recovery score, indicating improved readiness for the day ahead.

5. Supports consistent sleep patterns Wearing a sleep mask every night reinforces your circadian rhythm by creating a predictable dark environment. This consistency helps regulate your sleep-wake cycle over time.

6. Reduces sleep disruptions from external light Whether it's streetlights, early sunrise, or a partner's screen time, external light sources can fragment your sleep. A mask acts as a physical barrier, keeping your sleep environment dark regardless of what's happening around you.

7. Enables better sleep in unfamiliar environments Travel, shift work, or sleeping during daylight hours all present unique challenges. A sleep mask gives you control over your light exposure no matter where or when you need to sleep.

8. May reduce headaches and eye strainFor those sensitive to light, a sleep mask can alleviate tension headaches and reduce eye strain by giving your visual system a complete break during sleep.

Who should try a sleep mask?

Chances are, almost everyone can likely benefit from going to sleep with an eye mask on. "Light impacts my sleep and there's quite a bit of evidence to support that," says WHOOP VP of Performance Kristen Holmes, also on our podcast. "I wear a mask to filter out all the light and make it dark, dark, dark. To me, that's been a game changer in terms of my sleep data. You spend more time in deeper stages of sleep and you're just not interrupted by light, which is going to wake you up." In particular, a sleep mask may be useful for anybody who:

• Suffers from insomnia
• Is a light sleeper
• Works night shifts or has to sleep during the day
• Travels frequently

How to choose the right sleep mask

Finding the right sleep mask comes down to comfort, fit, and material. You want a mask that blocks out light completely without putting unnecessary pressure on your eyes or head. Look for contoured designs that leave space around your eyelids, allowing for natural eye movement during REM sleep.

Breathable materials like silk or cotton help regulate temperature and prevent skin irritation throughout the night. An adjustable strap is also essential to ensure the mask stays secure without feeling too tight.

When evaluating options, consider how the mask fits with your sleep position. Side sleepers may prefer thinner, more flexible designs that won't shift or bunch up against a pillow. If you wear the mask regularly, choose one that's machine washable to maintain hygiene and extend its lifespan.

Track your sleep improvements with WHOOP

Adding a sleep mask to your nightly routine is a simple behavioral change that can yield measurable results. WHOOP measures your sleep automatically, giving you a clear picture of how your new environment impacts your time in deep sleep and REM sleep. By logging your sleep mask use in the WHOOP Journal, you can monitor your individual trends over time and see exactly how this habit influences your Recovery, Sleep Performance, and overall readiness.

You can also use the Sleep Planner with the haptic wake alarm to wake up gently to vibrations on your wrist, eliminating the need for disruptive visual light cues or loud auditory alarms. This pairing creates an ideal sleep environment—complete darkness throughout the night and a gentle, non-intrusive wake-up that respects your body's natural rhythms. Join WHOOP to start tracking how small changes like wearing a sleep mask compound into meaningful improvements in your long-term health.

Frequently asked questions about sleep masks

What are the disadvantages of sleeping masks?

The main disadvantage of a sleep mask is potential discomfort if the fit is wrong. A mask that is too tight can cause pressure on your face, while non-breathable materials might lead to skin irritation or sweating. Choosing a high-quality, adjustable mask minimizes these issues.

Can a sleep mask help with headaches?

Yes, a sleep mask can help alleviate headaches by blocking out light, which is a common trigger for light sensitivity associated with migraines. Creating a dark environment allows your eyes and brain to rest more effectively.

Is it safe to wear a sleep mask every night?

It is completely safe to wear a sleep mask every night. As long as you wash your mask regularly to prevent bacteria buildup and ensure the strap is not overly tight, wearing one nightly is a healthy habit that supports consistent sleep patterns.