Medium, black, adjustable, terrain harness, neoprene lined harness that offers the right combination of pressure distribution & comfort, lined at the belly & chest straps with contrasting neoprene, offers optimum comfort during even the longest days jam packed with activity, 4 slides allow harness to be easily adjusted to just the right size to maximize your dogs range of motion, reflective safety stripe is woven in for added visibility, measure inches around the body, behind front legs, of your dog for the perfect size.