Imprint Method: Heat Transfer, Production Time: 3-5 business days - Face Masks. White, Individually polybagged. Non Medical. Included in FDA Emergency use authorization list. Manufactured by a certified manufacturer. Efficiency. Tested by National Personal Protective Technology Laboratory 2 non-woven outer layer, 2 melt-blown inner layer, 1 non-woven cotton middle layer. masks are designed to offer more protection than a standard disposable 3-ply mask. Metal nose clip is fixed to the inner of the mask, so it won't fall off. Registration #3016730115.