Wilkins Mask is made from a double layers 100% natural cotton fabric with Waterproof Technology. The mask is reusable and washable, the outer liquid-repellent coating will last up to 30 washes. Recommend hand washing and hanging dry the mask between uses. One-size fits all with soft elastic stretchy ear loops adjustable for both men and women and will not hurt your ears even after wear it all day. Design with inner filter insert pocket for adding a replacement filter with you can change it easily by yourself. This mask is use only for outdoors activities and daily uses. Suitable for any sports, cycling, camping, travelling, climbing, etc.