Mustang Survival Inflatable PFD with HIT- with Back Flap & ANSI Reflective TapeFEATURES The MD3183 T3 Inflatable PFD with HIT is Mustang Survival's top of the line inflatable PFD. Constructed of ANSI approved high visibility materials. This PFD is worn by police, EMS and traffic controllers. The MD3183 T3 is our brightest inflatable yet. The Hydrostatic Inflator Technology offers reliable inflation in a low maintenance design that will only automatically inflate when submerged in 4 or more inches of water and not inadvertently