KEMP USA 10-502 Ambu CPR Mask with O2 Inlet, Headstrap, Gloves, and Wipes set features an Ambu CPR Mask with optional patented one-way valve with filter. This mask prevents mouth-to-mouth contact with the victim's face. Its transparent dome allows the rescuer to check the victim's mouth for lip color and secretions. The mask is ready to use with no need to assemble valve and filter, which saves valuable time in emergencies.