CoreX Functional Fitness Gym Harness - Sled Harness, Speed Training Harness, Resistance Training Harness, Agility Harness. The CoreX Functional Fitness Harness is a versatile gym/fitness harness. It has been designed to undertake all functional fitness exercises, be it: sled hauling, sprint and agility training as well as resistance band workouts for multidirectional training. It is also a near universal fitting harness catering from waists from 27 to 45 inches and medium to XL chests. The harness features 9 over sized D ring attachment points enabling frontal, side and multiple rear attachment points, inclusive of a free moving Saturn ring. The belt area has three stationary, oversized, D rings stitched on each side and the rear centre which are ideal for carabiner/hook attachment. A Saturn D ring moves freely throughout the rear of the belt with 17 inches of travel, providing an ideal attachment point for fluid exercise.