This is a set of 5 diamond-shaped masks designed for easy breathing, made with wrinkle-resistant Coolmax (white) and dungaree fabric. The lining uses fabric that makes foundation colors less noticeable. Size when folded in half: Approximately 13.5-14 x 10 cm Materials: Outer fabric: Coolmax Dungaree Lining: 100% cotton The elastic uses round elastic that is gentle on the ears even after long periods of use. Adjust the knot of the elastic and tuck it inside before use. For care, we recommend folding in half and hand washing, then removing moisture with a towel and air drying. However, it can also be washed in a laundry net. Please understand that these are handmade before purchasing.