This combo pack of the BVM trainers are designed to look and function just like an actual Bag Valve Mask resuscitator and because they are for training only, they are the most cost-effective options for your training program. Includes 1 Adult/Child Practi-MASK CPR Training Mask with Bag Valve Squeeze Bag and Reservoir Bag, 1 Infant Practi-MASK CPR Training Mask with Bag Valve Squeeze Bag and Reservoir Bag, and 1 Mesh Bag. Latex-free.