soft, non-irritating elastic bands4-layer non-fiber-glass filter mediumbacterial filtration efficiency 95%integrated nose bridgecolor: blackbox with 50 pieces
thickness: 20 µblackembossedpacked loosely 50 pieces per bag
thickness: 20 µwhiteembossedpacked loosely 50 pieces per bag
approx. 40 cm20 µ thicknessin black, blue or white colour 100 pieces per bag