Camp made their XLH 95 Climbing Harness for adventure racers and ski mountaineers who want the lightest harness they can possibly find. Every weight-adding feature has been stripped from this 3.4oz wonder, leaving you with a system that's great for short rappels and the “just in case” belay when you're testing a slope. An elastic drawcord holds the XLH 95 Harness around your waist, so you don't always need a carabiner hanging in front. Though this Camp harness would be a poor choice for rock climbing, it's exactly what you need for times when you should have a harness but don't want to carry one.
Bottom Line: The Camp XLH 95 Harness weights only 3.4oz and fits in your pocket. Enough said.
I bought this after seeing one a friend had. It is incredibly small and light and pretty much perfect for Adventure Racing. Even though small, the webbing in the leg loops is wide enough to keep things comfortable on rappel, and I expect I could (if necessary) hang in it for pretty long without a problem. The reason a 4 and not a 5 is that it lacks adjustability in the waist. I was too big for the Large, but the XL is looser than I would like in the waist. Since I'm using for AR and not lead climbing, this doesn't pose a significant risk, but I would suggest that if you are buying to climb in and are in between sizes, go down so the fit is snug in the waist.
As an Adventure Racing rappelling harness the XLH is perfect. It is ultra light and compact, comfortable to run in and is adequate for the short rappels, traverses or climbs required in AR. It's low bulk makes it comfortable to wear under ski pants for ski mountaineering. The only down side is that the very narrow leg straps tend to cut in when taking your full weight during a rappel. I found leaning back and taking more weight on the waist helped.
It's a very light weight simplistic harness. It's more comfortable than i was expecting but not something i would want to hang in all day. Did a bit of repelling in it with out to much trouble. Will be using it this weekend for glacier travel. Bottom line, should be awesome for alpine climbing when the harness only needs to catch you on the occasional fall, but if your going to be hanging in it a lot and weight isn't a huge concern get something that will provide a bit more support.