HEAL INJURY FASTER - reinforced design with metal support springs sewn into each side of the brace, REFIT's Dog Leg Brace provides an unparalleled level of support and stability in order to help scar tissue develop and heal faster while remaining flexible and comfortable for your dog. Once the joint is supported medially and laterally, your dog can move easily without straining the Hock (Ankle) joint. VETERINARY ORTHOPEDIC DESIGN - Our Dog Leg Brace is specially designed for use in veterinary orthopedic professional care, as extreme support in dog back leg hock (ankle) injury, sprain, arthritis, joint support, and post-surgery recovery. Please note that this product is designed for back hind leg Hock (ankle) support, not for the knee area (upper leg). HIGH PROFESSIONAL QUALITY - Meets and exceeds the high expectations of certified veterinarians, custom-built with quality materials for a comfortable precise fitting, and durable Dog Leg Brace. PRODUCT SIZING *IMPORTANT* - Please see photos for exact size dimensions and dog sizing. Be sure to measure your dog's leg prior to placing an order. This product is designed for a dog's Hock (Ankle) support, not for the knee (ACL) upper leg area.