The Combat Application Tourniquet® is a small and light weight one-handed tourniquet that occludes arterial blood flow in an extremity. The C.A.T utilizes a durable windlass system with a patented free-moving internal band providing true circumferential pressure to the extremity. Once adequately tightened, bleeding will cease and the windlass is locked into place. A hook and loop windlass retention strap is then applied, securing the windlass to maintain pressure during casualty evacuation. The C.A.T's dual securing system avoids the use of screws and clips which can become difficult to operate under survival stress or where fine motor skills are compromised.