*Soft, foldable pocket size design. Ready to be used immediately. *One-way valve with 3M filter protection to ensure safely resuscitation and prevent cross contamination. *quipped with unitary 22mm ID oxygen port and can be used as oxygen mask after CPR without changing mask. *Pre-inflated contoured soft cuff shapes easily to fit adult, child and infant facial contours. *Transparent design for better observation and medical care