Checking in at just 105 grams, the Black Diamond Couloir UL is built for the weight-conscious alpinist or ski mountaineer. With a buckle-less design, the Couloir UL features rabbit-ear tie-in points, and two webbing gear loops. The low-profile vari-width Dynex monofilament waist and leg loop webbing is highly breathable, and the minimalistic design allow you to put the harness on while wearing crampons or skis.