Welcome to Elysaid We are from China. We sell First aid kits, Health&Beauty care Items ,Medical equipments ,Home&Garden tools and many more. We more professional on AED trainer , CPR Face masks and health care equipment which all with a high cost-performance .Welcome to wholesale! Please add me to your list of favorite sellers. Thanks! Features: 1. One way valve with filter – fits in case while attached to the mask 2 .Easy way to secure to victim. 3. Affordable and practicle. 4 .The CPR Mask be packed in a Keychain bag. 5 .It is compacted in shape, can be placed into any first aid kit and carried easily. 6. It will low resistance unidirectional valve and water filter are combined to block fluid and secretions, valves and filters together played a barrier to rescue personnel and sick.