RZ Industries M1 Neoprene Mask Crafted from the same high-quality neoprene used in wetsuits, the M1 Neoprene mask offers superior comfort, durability, and warmth in cooler temperatures. Designed for effortless use, it comes with a single strap hook-and-loop closure for quick and easy fitting or removal. Features: Metal nose bridge can be shaped to conform to your nose Replaceable active carbon filter removes 99.9 of dust and particulates from the air Protects against cold weather without building up condensation inside Dual exhaust ports allow for efficient flow of inhaling and exhaling Included: 1 RZ Mask 2 F1 filters 1 Storage bag