Mustang Survival Deluxe Auto Hydrostatic Inflatable PFD with Harness:Hammar 1F auto hydrostatic inflatorMaintenance free for 5 years unless inflatedLightweight and comfortable designNeoprene Comfort CollarTMProvides 35 lb of buoyancy when inflatedCylinder is contained inside bladder to protect against corrosionDurable 420-Denier nylon and heavy duty polyurethatne coated nylonStrobe light holder, safety whistle and SOLAS reflective tape on badder This product ships in approximately 1 days