Contoured to fit the lower leg, can be used on the front or hind legs. Wrap cold packs around the leg first and place the boots on top of them. Stretchy pockets allow insertion or removal of panels and secure velcro fastenings prevent slipping. Neoprene outer, elasticated inner pockets, soft binding. Includes 2 boots, 2 ice packs, 2 vibration panels, 1 charger.