Mustang MD3153 T3 High Vis. Inflatable PFD With HITANSI approved materials for our highest visibility vest! The MD3153 Inflatable PFD with HIT (Hydrostatic Inflator Technology) is Mustang Survivals top of the line inflatable PFD. Constructed of ANSI approved high visibility materials also worn by police, EMS and traffic controllers the MD3153 T3 is Mustangs brightest inflatable yet. The Hydrostatic Inflator Technology offers reliable inflation in a low maintenance design that will only automatically