The Innosonian America-C99007 Brayden Adult Lung Kit Version A04 is a bulk pack of single-use disposable lung bags engineered for all Brayden adult CPR training manikins. Featuring an integrated non-rebreathing filter valve mechanism, these replacement airway bags ensure safe, hygienic ventilation training by venting exhaled air out through the back of the manikin head. This non-rebreathing design prevents backflow of air and moisture, protecting students from cross-contamination during multi-person resuscitation and BLS certification courses.