Heavy Polyester Top knit masks. Moisture-wicking properties. Heavyweight 100% polyester. Earhole Slots will allow mask to fit various face shapes and sizes. Washable and reusable. Material: 2 Ply. Stretchy Ear loops are only applied to Size 6.5" and 7" sized ear-loops. If size is not specified, stretchy ear-loops will be automatically be applied to 7" sized ear-loops