My current prolimit rambler seat harness is getting a bit tired.
Thought I might get a new one.
What do people recommend as a seat harness for slalom/gps speed sailing and general cruising around.
Severne CMR if you can get hold of one. Best harness I've ever had. Higher hook, great hook too. Full back support, feels very comfortable and very versatile, I use it for flat water and waves.
Can't say enough about the Liberty Carbon Harness. Becoming very popular with PWA slalom sailors for good reason.
It depends on whether you want a high or low hook. For GPS speed sailing I like the Severne Pod because it has a low hook. I solved the slipping straps by looping the straps as noted above in posts by Remery and Catchmeifucan.
I used to have a Prolimit Rambler, they were good. I currently use an ION Fuel. They have minimum padding so fit to your body shape, unlike harnesses with hard padding/shells where they only fit where they touch. 4 anchor points for the spreader bar, so you can adjust height a bit. They had a bad batch of spreader bars 6 or so years ago, which broke prematurely, but fine now. They were cheapest on the market too. I bought a spare harness (about 5 years ago when I bought a replacement spreader bar, still unused) as getting seat harnesses can be difficult as the shops tend to want to sell expensive waist harnesses.
I have a Severne Pod for years and has no issues with it.
Best seat harness I've ever had.
Not for you if you like a big padded harness though.
Have a look at the Starboard Drake (developed with Liberty) in this case.
as an tangent to this topic, I'm not convinced that seat harness gives better back support. I say this as someone who always used a seat, even in waves, until about a year ago. I have had fewer back problems since then, after switching mainly to waist. i suspect that with so much weight and force on your lower back and coccyx, that every bump and jolt from the rig imparts sudden compression on that area many times a minute. Rather than supporting your back, the seat is jarring it. This does not happen nearly as much with the waist harness. At least that's what i think is happening with me. (That said, I'd still go for a seat if using a big sail, long lines, out board straps and really hanging out off the rail using your body weight in that way.)
The worst for my back has been the more modern free-ride seat harnesses, they just seem to block all the movement of the lower back.
The waist harness is much better, for me, but the regular ones will keep sliding up when slogging. The best for me has been the hybrid ones, they fit like a waist harness but can also be positioned precisely over the hips and will stay there due to the leg straps. I now use it for everything, Formula, slalom and waves. Highly recommended.