If you only suffers from insomnia, or poor sleep, or easily wake up by a little light. If you want a good rest on your flight, or in the train. If you can't fall asleep when your partner need the light on to read, or watching TV. If you do a lot of yoga meditation. You need a sleep mask POP-Zone sleep mask is made of 100% natural mulberry silk for both the exterior and the filling, making it lightweight for comfort around the eyes, and super-smooth and soft on the skin. Great for those with sensitive skin. Adjustable elastic strap to make it perfectly fit around your head. This 100% silk contains no synthetic materials and has a feel which is unparalleled. Silk's natural amino acids promote the rehydration of your skin. Enjoy the benefits of 100% natural silk, and comfortable blackout. Good sleep is the best way to care your body.