Item name: CPR mask Application: school, travel,etc. Function: CPR protect Material: PVC Bag Size: Approx. 1.97*2.16 inch / 5*5.5cm Mask Size: Approx. 11.02*7.08 inch / 28*18cm Mask: One-way Package include:1Pc CPR Mask This is for 1 mask in a soft case on a key chain. Our Emergency CPR mask is designed with the rescuer/first responder in mind. Sized for use on adults and children, our clear mask allows the rescuer to position it properly and monitor the victim. Features: One-way valve with filter - fits in case while attached to the mask It is compacted in shape, and carried easily. Easy way to secure to victim. Affordable and practicle. The CPR Mask can be packed in a Nylon bag.