The SDI Diagnostics PulmoGuard II PFT Filter Kits with Comfit Mouthpiece are high-efficiency, single-use respiratory safety packages engineered to streamline clinical patient setup during pulmonary function testing (PFT). Designed by SDI Diagnostics to maximize infection control, this specific kit configuration pre-bundles a premium electrostatic barrier filter together with an ergonomically contoured, rubberized-style Comfit disposable mouthpiece inside a single hygienic wrapper.