If you are an alpine rock or ice climber and want the lightest harness that still has gear loops and some support, it is hard to beat this one. It is a specialty harness; you won't wear it to the gym or cragging. But for traveling ultra-light in the mountains, it is hard to beat. If you don't mind a slightly heavier harness that is also more expensive, check out the or the Black Diamond Ozone.
The Camp Air is now called Camp Air CR EVO, new for 2015.