[2] When future world champion Robby Naish began using a harness in Kailua in 1975 when he was twelve years old, he had problems with his chest being painfully squeezed by the force on the hook.
Mike Horgan and Larry Stanley developed a spreader bar to balance the load and prevent the harness from squeezing the wearer's chest.
The seat harness was developed on Maui when young Ian Boyd experienced the same problems mentioned above as Robbie Naish.
This design proved to be very efficient in speed sailing and was used by Fred Haywood in his world speed-record runs.
Many companies have developed the harness over the years with major innovations coming from DaKine and Windsurfing Hawaii.