Harness Momentum W. Black Diamond Momentum climbing harness is for all-around climbers who know that time spent fiddling with leg loops and adjusting a pinching waistbelt is time wasted and delivers a time-saving design for all styles of climbing.. A pre-threaded Speed Adjust waistbelt buckle saves time and eliminates error when tying in, while Dual Core Construction puts an emphasis on comfort, even when yourare posted up at a hanging belay. TrakFIT leg-loops easily adjust for cool fall days at the crag or blazing summer days on long multi-pitches, and four pressure-molded gear loops and a haul loop make this their most popular all-rounder.