With everything you need to get started in the gym or at the crag, the momentum 4 s harness package is a complete, convenient package featuring our most versatile all-purpose harness, belay device, locking carabiner, chalk, and chalk bag. The Black Diamond Momentum 4S harness features maximum adjustability and range of fit. Two Speed buckles on the waistbelt and one on each leg loop allow for an incredible range of fit for multi-season and multi-climber use, while the tall, bullhorn-shaped waistbelt improves comfort during long belays.