3-layer medical mask - ·100% Polypropylene ·Medical disposable mask with 3 protective layers (Spunbond-Meltblown-Spunbond non-woven fabric) type II ·External hydrophobic protective layer ·Inner layer with antibacterial filters ·Inner layer absorbs moisture ·Full plastic nose clip, elastic ear loop ·Skin-friendly, breathable material ·Bacterial filtration efficiency ≥ 98% (BFE) ·Fire resistance class 1 ·Complies with ISO 13485 and ISO-8 cleanroom standards ·Sold in 50 pieces - Please enter the number of selling units: e.g. 2 units (if you need 100 pieces of masks) ·The product is non-returnable