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