Mustang Survival Corp Inflatable PFD with HIT (Auto Hydrostatic) 1F auto hydrostatic inflator technology Inflator is maintenance-free for 5 years from date of manufacture. Upon inflation, it is essential to inspect and re-arm your PFD before next use Neoprene Comfort Collar 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