These Disposable Cuffed Masks are 100% Latex free, and made of PVC. The contoured anatomically-shaped cushion provides a comfortable seal for the patient and prevents most or all blow-by during oxygen administration. The disposable mask comes in a variety of sizes. The masks fit industry standard 22mm adapter. The masks intended use is for resuscitation / oxygen administration use (with BVMs, Ventilators, etc.).