The lightweight mask is made of polyester fiber. It feels cool when worn in summer. The mask is washable and reusable, so it is not harmful to the environment. It has a stylish design and is suitable for men, women and children. It is suitable for cycling, camping, running, traveling, climbing and daily use. It can also protect you from smoke, passive smoking, etc. 12 3/16'' L x 5 1/8'' W