The media used in pleated air filters for medical breathing devices is critical to the efficiency and functionality of the respiration unit. Lydall custom engineered LydAir^® air filtration media to provide the highest available efficiency. With a minimal resistance to air flow and 100% mechanical efficiency, this media incorporates an ideal balance of properties for a variety of medical breathing applications. Comprised primarily of microfiberglass, this media can be customized for specific applications and is available with antimicrobial or water repellent treatments.