Coastal's Size Right Adjustable Nylon Dog Harness is simple use. Just place it over the dog's head, snap the buckle around the girth with the contoured snap-lock buckle. These figure "8" styled harnesses are completely adjustable for the perfect fit. The comfort pad with a swivel O-ring allow dogs to move freely without the leash tangling around their legs. Size Right harnesses are effective for dogs who try to back out of a harness.