Size: XL, L, M, S Style of "XL""L" is for adults, and "M""S"is for children Size: XL, L, M, S Style of "XL""L" is for adults, and "M""S"is for children Made of medical PVC Adjustable nose clip Medium concentration Availabe with anti-crush 7ft tubing It is mainly recommended for Paramedic and Accident & Emergency departments FEATURES: Made of clear, medical-grade PVC Transparent mask made with soft anatomical form for better fit Adjustable nasal clip Optional oxygen supply tubing available Anti-crush tube XL, L, M. S sizes are available Flexible Plastic Mask with elastic head strap Latex Free