Merlin e-Mask CPR Facemask The innovative Merlin e-Mask is an essential item to keep close to hand and is a must-have accessory for any doctor's or nurses bag. It's there when you need help the most. A one-way valve with directional diaphragm ensures no backflow of air or contaminants from patient to rescuer. Features One-way valve and directional diaphragm Suitable for adult or child Flexible dome folds into pocket sized case Complete with standard O2 port and headstrap Complete with a pair of latex-free vinyl gloves