This incredible new product is sure to change your breathing experience. RZ MASKS are made from soft neoprene that fit snugly under helmets and goggles. RZ Masks have a N99 Active Carbon filter, which effectively filters out 99.9% of dust, particulates, pollen and odors in the air. The filters themselves are easily replaceable and can be changed depending on usage. It was designed with a MP3 player holder for added enjoyment.