CPR Mask with 15mm mouthpiece. Adaptable with a One Way Valve, (Not included, must purchse One Way Valve separately, item 30799.) Consists of double wall construction allowing less effort to hold mask in place while tilting victims head back. Special shape chin area helps seal dentureless victims. Made of low density soft polyetheline plastic. Not affected by hot or cold temperatures. Odor free. Perfect for avoiding blood or vomitus situations.