1.This eye mask is made of 100% high quality natural mulberry silk, it is ultra-light and thin, comfortable, breathable and skin-friendly. Our sleep masks are non-fading, so it won't stain your white sheet or pillow black. Others same style eye mask are made of poor material, so it will stain your white sheet or pillow black. 2.100% Blackout Sleep Mask: Adjustable eye mask perfectly to your face to block out 100% of light. True blackout unlocks ultimate deep sleep in ANY environment and any position. 3.ABSOLUTELY NO HEAD PRESSURE: Fully adjustable, you can adjust the strap as you need, zero head pressure, 100% Block Out Light, adjustable strap allows you to sleep like you're not wearing a sleep mask, allowing you to have a good sleep. It is suitable for men, women, teens and children. 4. MORE REM SLEEP - Naturally improve your mood, energy levels, and cognitive function and sleep through the night with this silk eye mask that naturally blocks out light for faster, deeper sleep every night. 100% Premium Silk that will improve your sleep and relax you and your eyes. Silk is naturally breathable and naturally soothing to the skin. 5.BEST SLEEP TOOL - This eye mask is a good helper to eliminate fatigue, improve sleep quality and give you more energy to work and study. Suitable for travel, shift work, meditation, yoga, etc. Suitable for different kinds of occasions, such as indoor, outdoor and camping.