With 4 buckles for maximum adjustability and fit, the Momentum 4S is our most versatile harness for everything from gym belaying to moderate alpine ascents. The Black Diamond Momentum 4S harness offers maximum adjustability and fit. Two speed buckles on the waist belt and one on each leg loop provide an incredible fit for use across multiple seasons and by multiple climbers, while the high, bullhorn-shaped waist belt enhances comfort during long belays.