The 4-ply KN95 face mask is tested with 98% filtration with a tight fitting design. The flexible design and rounded shape provide optimal comfort and a substantial breathing area. The 4 layers of protection are composed of high-quality materials such as non-woven, melt-blown fabric. It does not contain graphene, is ideal for protection from Covid 19 or workplace dust. Comfortable formfitting nose piece and ear loops. Individually packed for better hygiene standards. DED and Health Canada approved, GB 2626-2006 performance standard. 20 per box, 20 boxes per case.