The Best Sleep Tool: you eliminate fatigue, improve the quality of sleep a good helper, so that you have more energy to work and study. Ideal for travel, shift work, meditation, yoga, etc. Includes 4 eye masks,Suitable for indoor, outdoor and camping. Suitable for Any Sleeping Position: whether you are on your back, side or stomach. The tilt is super fitted to both sides, avoiding movement and putting no pressure on the temples. Improved Adjustable Buckle: Gentle, painless, easy-to-adjust headband that won't tangle your hair or hang on your pillow. Fully adjustable shoulder strap from 18.5 "to 27.5". 3D Contour Design: Stress-free, allowing you to blink freely without touching eye makeup, increg REM sleep. 100% Light Blocking: The ergonomic profile improves light blocking performance by 99% for complete darkness, perfectly matching any height of the nose.