The Sporn Ultimate Control Harness™ features a patented, comfort design that gives the dog owner several ways to humanely control their dog when on the go. It's designed for moderate to heavy pullers. It's easy to put on and is guaranteed to start working instantly, using the "Sporn Effect", without intensive training! The Ultimate Control Harness™ is fully padded for comfort and contains reflective stitching for safe night walking. Neck and girth straps are fully adjustable to ensure a proper fit.Do not leave harness on the dog unattended. It is for walking/running purposes only and is not to be used as a tie-out or car harness. Available in black or red colors in LG/XL size only in stores.Sizing Recommendations:Large/X-Large: Girth of 24-40 inches, or dogs weighing approximately 75-150 pounds