Breathing is easy 3D Japanese Silk Mask ★ Although it is one size, it covers the face from the eyes down and is a large size that extends to the neck. The outer fabric is cotton linen. The inner side that touches the skin is 100% Japanese silk. The ear loop rubber also has an adjustable heart-shaped light pink stopper. * Some people may not be able to use silk on their skin. * We received a thank you note from a customer who purchased the mask, saying that their skin irritation from masks was cured after switching to a 100% silk mask.