Mustang Survival Corp Inflatable PFD with HIT (Auto Hydrostatic) and Bright Fluorescent Inflation Cell 1F auto Hydrostatic Inflator Technology will automatically inflate under water pressure, not inadvertently in rain, spray or humidity Bright fluorescent yellow-green inflation cell for improved in-water visibility SOLAS reflective tape, safety whistle and strobe light attachment on inflation cell SecureZipTM closure stays shut in high winds and still opens easily on inflation Provides 35 lb. of buoyancy when inflated - more than twice standard foam PFDs