The ZANheadgear Gaiter Mask features an interior pocket for a PM 2.5 filter (1 x included), built-in aluminum nose bridge, with pre-cut ear loops. The gaiter mask is made from breathable, moisture wicking polyester to allow comfort in all climates. The built-in aluminum nose bridge provides a secure fit, creating a tighter seal & reduced fogging when worn with eyewear. Material: 100% Polyester.