size:17.5*9.5cm feature:3-ply structure,effectively prevent from bacteria and dust Application:3-ply structure,effectively prevent from bacteria and dust,ultrasonic machine-sewed,with earloop and nosepiece Material:Non-woven cloth Size:17.5*9cm Color:White Blue Green Pink Yellow Packing:50pcs/box 1,000pcs/carton Weight:18gsm+20gsm+25gsm 3-ply disposable medical face mask