Helps reduce the risk of cross contamination and transference of viruses and bacteria between the victim and rescuer in situations where mouth-to-mouth assistance is required. Does not compromise air permeability or require excessive breathing effort. Also used as a CPR training aid to protect against cross contamination. Eliminates the need for mannequin sanitization. Packaged in a compact, easy-to-open format. Fits easily into a first aid kit, pocket, purse, knapsack or glove compartment.