Heat Resp-O2 HMEFs are single-use respiratory devices designed to provide humidificatoin and help prevent mucosal dryness during mechanical patient ventilation and other respiratory treatments. The integrated bacterial/viral filter reduces the risk of contaminatiion and provides protection from airborne particles and microorganisms. Features a low-resistance design to best support patient's breathing. Lightweight design for maximum patient comfort. Transparent housing enables effortless palcement. Sampling port proximal to patient adds to overall convenience. Not made with natural rubber latex. Does not contain DEHP.