Bound Tree Bag Valve Masks (BVM)Bound Tree Bag Valve Masks (BVM) features: A rotating exhalation port which deflects body fluids away from the rescuer and accepts all 19 mm PEEP adapters A 360 degree patient swivel Angled head assembly that eliminates the need for a double swivel adapter Reduces user fatigue Child unit comes with a pop off PVC and latex free Superior feel and recoil Made with Natsyn, a synthetic rubber developed by Goodyear