PATENTED AND THE HIGHEST QUALITY BRACE ON THE MARKET WATCH OUT FOR POOR QUALITY COPIES The Walkabout knee brace is a 3.0 mm neoprene compression sleeve that is designed to support and stabilize the knee joint. This product offers excellent support for knee joint injuries, Luxating patella or severe arthritis due to old age or chronic instability. The knee brace comes with a suspender which can attach to a chest halter.. A chest halter is not included with this purchase but it is recommended that one is used in combination with the Walkabout Knee brace. Fit is determined by measuring the leg and following the size charts. Try to measure as straight a leg as possible. If the injured side is swollen please measure the uninjured side to get an accurate measurement. The fit is usually determined by evaluating the measurements 1" above the knee. If the other measurements do not fit in that size category please email us your dogs breed, weight and measurements to help choose the best size. *compatible with the Walkabout chest halter MEASURE CAREFULLY, 1" ABOVE THE KNEE GETS THE RIGHT FIT, THESE FIT EXACT AND DO NOT SIZE DOWN DUE TO REVIEWS