CPR Rescue Mask,10 Rolls, 36pcs Each Roll,total 360 pcs Each piece mask size:29.5x19cm, there is a round size non-woven fabric membrane on center, it can resist water and saliva, but allow air ventilate. When use on emergency artificial respiration, this mask can prevent disease as AIDS transmit and infect. The the can filter out 95% of becteria. 36pcs mask in roll, each piece can be disparted easily, packed in paper box, non-sterile. It’s suitable for artificial respiration training Package included : 10 rolls/pack.