KEMP 10-507 Adult Ambu Bag Valve Mask is the only resuscitator that is made from a SEBS material instead of PVC. This classifies the KEMP BVM as environmentally safe and fully disposable, thus eliminating all risks of cross contamination. Simple is good, but simpler is better. The crystal clear valve housing provides an unimpeded view of the valve operation, and the slim design makes it easier to view the mask.