15pcs (Adult M )CPR Resuscitator Face Mask First Aid Rescue with One Way Valve Pocket Mask The item has a ventilation inlet with One-way valve. It is compacted in shape, can be placed into any first aid kit and carried easily. Perfect for first aid training/ first aid rescue The CPR Mask be packed in a heart pouch . The inlet can be replaced。 Food-grade material More than 10 years experience Supply other first aid equipment(keychain CPR ,AED trainer....)