Protective 3-layer disposable mask with flexible nose clip. The mask is made of non-woven synthetic hypoallergenic material - microporous polypropylene (medical spunbond). Has 3 layers, density of each layer - 20±2g/sq.m (to the face a layer of white color). The total density of the mask is 60 g/sq.m. The mask has factory soldering (not stitched) and a metal nose clip (in the upper edge of the mask at the level of the nose, there is a flexible plate inside). Mask size: length 17.5 cm, width 9.5 cm, 3 folds at least 1.2 cm deep. It has white elastic bands. Provides protection against bacteria and infections that are transmitted by airborne droplets, from dust and car exhaust. Filtration efficiency: BFE >= 95%, PFE >= 95% @ 0.1 micron. Sold in packs of 50 only.