high quality Adjustable StrapElastic buckle strap easy to adjust from 20 inches to 25 inches to suitable for Men Women Kids of different head sizes. Put silk to cover the adjustable band(100% Mulberry silk on both sides, and 100% silk filling ), makes it so comfy on your head, and doesn't tangle/stick your hair unlike other masks Perfect for Side SleeperNew design of 15 tilt angle ultra-thin sides of the eye mask for sleeping which can reduce 90% pressure on your temples. Sleep more comfortably when is on your side, a perfect light-blocking sleeping eye mask for back and stomach sleepers 0 Pressure on the Eyeswith 3D contoured eye cups, you can open your eyes with the mask on and not feel your lashes touch it at all, whether you have lash extensions or not, the perfect eye holes Soft, Breathable & LightweightMade of pure mulberry silk, soft, breathable, smooth, comfortable, lightweight and gentle on the face; As silk is a protein fiber that releases amino acids, which can accelerate skin metabolism and delay skin aging. Silk, being a natural fiber, is more environmentally friendly compared to synthetic fibers and is gentler on the skin Block Out Light Perfectlywith upgraded nose cutout, sleep eye mask fully fits all nose shapes, blocks out any light, ensuring a completely dark environment for sleep. Tips: Correct the position by adjusting the strap or moving the eyecup to make it firmly fit your nose to keep the light out