Comes complete with all the features that first responders find important. The soft cushion mask offers a secure seal, while the one-way valve and filter prevent backflow of air contaminants from patient to rescuer. Convenient, safe and effective way to administer CPR. Features: Mask with O2 inlet, one way valve, 3M filtrate filter, head strap. Sturdy compact storage/carrying case. Latex-Free. Fully assembled—ready to use. Buy 5 or more for $15 each.