The SDI Diagnostics PulmoGuard Filter Kits with Comfit Mouthpiece & Kushion Klip are premium, high-efficiency, single-use respiratory safety packages designed to optimize clinical workflow during pulmonary function testing (PFT). Engineered by SDI Diagnostics, this complete convenience setup pre-bundles a high-efficiency barrier filter, an ergonomically contoured Comfit mouthpiece, and a soft, padded Kushion Klip nose clip all inside a single hygienic wrapper. This comprehensive configuration provides clinics with a true all-in-one patient solution, ensuring maximum compliance and zero external air leaks during aggressive expiratory maneuvers.