Ninja reusable masks by Hidesign are handcrafted in four layers using 100% Cotton, support fabric and two layers of filters. Breathable, stays cool and keeps you comfortable, the mask has adjustable, round elastic bands and a nose clip. With double flaps on the top and bottom, Ninja can easily be modified for different facial structures and sizes, depending on the coverage required. Made in non-allergenic,100% cotton with vegetable tanned leather details this mask is designed for protection.