If you haven't seen one of these in person, you'll be impressed. The waist belt and leg loops about the thickness of two quarters. This means the harness feels like you are not wearing anything. In addition, this harness has a number of quality design features such as a smooth self-locking buckle and awesome gear loops. Not surprisingly, the R300 is the most expensive harness we've tested.
The R300 is lighter and more compact, but less comfortable than the Black Diamond Chaos, our Editors' Choice climbing harness. Although the R300 is more comfortable than its predecessor, we prefer the R300 for sport and gym climbing and the Chaos for long multi-pitch routes with hanging belays. The best value harness is the Black Diamond Momentum, which can be purchased for as little as $50.
This was our favorite cragging and gym climbing harness because it is so full featured while being light and compact. Although it is the most expensive harness, the Arc'teryx lifetime warranty insures that you will enjoy it for, well a lifetime. On a strict budget, get the Black Diamond Momentum harness. If you want the ultimate sport climbing harness at any price, try this on next to the Black Diamond Ozone and see what fits best. Another budget pick is the Mad Rock Alpha Harness but if you want the coolest harness out there, one that will turn the most heads, this is it.