Full Blocks Out Light: this blackout eye mask for sleeping, Reasonable thickness, sleep masks will not press on your head or stick to the eyes when lying down, and can block light well even if you sleep on day. it is a natural sleep aids for adultsinsomnia or beauty sleep.Hypo-allergenic: Real Silk is called "Queen of Fibers", "The Second Skin of The Human Body", great for Allergy Sufferers and Aches and Pains, Itchy Skin , helpful to relieve dry eyes and fatigueand , and may Aid Blood Circulation and Digestion.Suitable for big and small heads: Using Lengthened High Elastic Silk band, suitable for head circumference within 55cm, not too tight & not too loose, extremely soft and kind to the skin. Headband wont slip off , wont bite into your ears or skin,you even soon forget you are wearing it. (Oversized Eye Mask, Approx:Length 20cm,Height 10cm, Nose Depth 2cm, Straps 35cm)