Alan:

I suggest you try to borrow some harnesses form fellow sailor before you make final decision. If you plan to spend a lot of time in the harness take a serious full at a full that has the lumbar support. You can move it around till you find the right spot. I really like mine and have no sore back anymore that I use to get with the old diaper type from the old days. Have the straps on the legs really takes the pain off the crotch.