The Innosonian America-C99102 Brayden Adult Face Shield Membrane pack provides clean, protective barrier filters for mouth-to-mouth ventilation training on Brayden adult CPR manikins. Designed with an integrated low-resistance one-way air filter valve, these face shield inserts allow air to flow freely into the manikin's lung bag while preventing backflow of moisture and air toward the trainee. This 10-pack ensures hygiene compliance and student protection during multi-person resuscitation training sessions.