Mustang Inflatable H.I.T Auto W/HRThis front entry PFD automatically inflates when submerged in 4 or more water pressure and features an integrated sailing harness for serious sailors. Heavy duty stainless steel D rings built into the front of the vest can attach to safety tethers. The exclusive Hammar Hydrostatic Inflator Technology (HIT) deploys only when submerged and not when hit with rain, spray, or humidity. The SecureZip stays closed during high winds but opens easily on