-Large 3D Eye Cups -- The eye cups are large enough, rests against the eyes, so soft and smooth that it doesn't tug at the lashes at all and doesn't put pressure on eyes even during REM,Total Blackout -- Unique mould rests on acupressure points around the eye socket like magical pillow, helps block the light that tends to sneak in under the nose bridge on most other masks,Wide Adjustable Strap -- The adjustable strap is wide enough to apply even pressure and soft enough to be pleasant. 9.29 inches long and 3.74 inches wide, fully adjustable strap from 15.8 inches to 24 inches, suitable for different head circumference,Soft and Comfortable -- Made from high-desity soft spongy foam encased silky cooling cover for an ideal balance of comfort & breathability,A good sleep helper -- An indulgent gift of relaxation and travel accessories that instantly transforms your slumber into a refuge of bliss and be more productive,Washing -- Hand washing is suggested or machine washable on the gentle cycle in a lingerie bag