Specifications Mask materials: Nylon spandex and polyester Velcro mask. Plastic exhaust valves and plastic and metal nose piece. Filter layers: 2x Waterproof nonwoven polypropylene, anti-odor activated carbon, cotton prefilter, and electrostatic meltblown cotton submicron filter. Department: Unisex Adults out stretching). Comfortably fits 20" to 25” head circumferences. Suitable for cycling, climbing, running, outdoor sports, etc. Package Include 2 x Half Face Mask 4 x Replacement exhaust valves 12 x Replacement filters or Package Include 1 x Half Face Mask 2 x Replacement exhaust valve 6 x Replacement filters.
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