When it comes to quality, durability and performance, the Lifesaver CPR Mask is the 1st responders choice. The mask features a replaceable one-way non-rebreathing valve with a biological filter. The Lifesaver CPR Mask has a clear, odorless dome for patient monitoring. The soft, flexible mask conforms easily to the faces of adults, children and infants and remains pliable even in extreme temperatures. The Lifesaver CPR Mask requires no assembly and instantly opens to a ready position. It also comes with an oxygen inlet valve, head strap and water resistant hard plastic case.