RZ Dust/Pollution Mask w/2 Scentless & 1 Active Carbon Laboratory Tested Filters, Model M1, Mossy Oak Duck Blind, Size X-Large Neoprene Construction . Tough-duty durability 99.9% Replaceable Active Carbon Filters Dual one-way discharge valves . Reduce condensation Adjustable nose clip .Prevent fogging Adjustable Velcro Strap . Universal fit Filters tested at Nelson Laboratories, USA