Features of the AirLife Disposable High-Concentration Adult 3-in-1 Mask with Safety Vent: Adult Nonrebreather Mask (Under-The-Chin Style). AirLife disposable latex free oxygen masks are made from soft, high-grade vinyl resins. The smooth, feathered edges are designed for patient comfort while reducing irritation points. The masks are designed for anatomical compatibility. A full range is available to meet all requirements in infant, pediatric and adult sizes. 3-in-1 masks are packaged as high-concentration, nonrebreathing masks complete with reservoir bags and one-way valves. With one of the largest catalogs of medical, surgical and diagnostic supplies available online, Medex Supply can accommodate your facility's needs for Respiratory. Combo Masks & Tubing can be found in our extensive online collection of products from globally recognized and trusted brands, including Allegiance. An excellent option to consider is the AirLife High-Concentration Adult 3-in-1 Mask with Safety Vent & 7' Tubing.