This professional new addition is effective and inexpensive. Made of glass clear plastic, and designed to fit ADULT & CHILD. Patented one way valve and silicone directional diaphragm allows no backflow of air, or contaminants from patient to rescuer. Meets all clinical and technical requirements, i.e. Flowrates, tidal volume and volume pressure ratios. Super soft inflated cushion. Mask is not affected by extreme temperatures. Standard 22mm fittings that can be adapted to any resuscitator or bag mask. Flexible dome folds down into a pocket size mask.