The Ops-Core half-mask Special Operations Tactical Respirator (SOTR), intended for ground applications (not aircraft applications), is designed to provide protection against a wide range of oil- and non-oil-based particulate contaminants. SOTR is a low-profile respirator mask that features 99.97% filtration efficiency against airborne particulates, including lead, asbestos, lubricant mist, explosive gunfire, and more. The user-based design prioritizes both safety and comfort, with two exhalation valves for easier breathing and a flexible, lightweight silicone facepiece made to fit a range of facial types. This ballistic respirator allows for quick, one-handed filter changes to keep up with the most fast-paced missions and has a central-mounted filter for better weapon interface. SOTR is suitable for a variety of applications, including conducting sensitive site exploitation, breaching, vehicle-mounted operations, helicopter operations, and live fire ranges. The SOTR can be worn with...