ATV Tek Elite Deluxe Neoprene Dust Mask (Black, 18") The sewn in filter blocks 99.5% of all dust particulates which keeps you dust free and comfortable while working or playing in dusty environments. The new 3D nose box and ear suspension straps take comfort to a whole new level. Finally, a Mask that comfortably fits all different sized noses and faces A sewn in filter and (2) tek valves that keep dust at bay. Washable and reusable. No need to buy replacement filters