Automatic but the H.I.T. only!!! ( Hydrostatic Inflator Technology )

No more inadvertent inflations and low maintenance requirements make the award-winning Mustang MD3183, Deluxe Inflatable PFD with HIT ( Hydrostatic Inflator Technology ) Mustang Survival's top-of-the-line inflatable PFD. Designed for serious users with exclusive technology that enhances safety and minimizes maintenance, this is Mustang's most popular inflatable PFD.

The Hydrostatic Inflator Technology offers reliable inflation in a low maintenance design that will only automatically inflate when submerged in 4 or more inches of water and it will not inflate inadvertently due to rain, spray or humidity. It also features the patented SecureZip� closure system to ensure the PFD will stay closed during even the most rigorous activity and still opens effortlessly upon inflation.