The Sports Harness comes in 4 Colors (Black, Blue, Red, and Yellow) and 5 sizes (XS, S, M, L, and XL). For the colors, we used popular sports team color combinations so you can support your favorite team with Gooby Sports Harness! Unlike nylon strap harness that digs into your dog?s skin, the Sports Harness is made with 100% polyester mesh that distributes the weights evenly throughout the chest. The synthetic lamb skin strap adds a soft touch to your dog. The Sports Harness also has dual adjustable straps that provide a necessary adjustment for a perfect fit, as well as a snap on buckle for easy wear. O-ring on the Sports Harness creates an unrestricted lateral movement so your dog can move left and right without having to be pulled on the side. Unlike conventional harnesses, our D-ring is located at the bottom of the harness. We realized that the main point of having a harness is to minimize the force that goes to the neck. If you pull on a leash and the force goes to the neck, there is no difference between that and a collar! This is why the Sports Harness has a D-ring on the back of the harness, so that any force that remained on the neck is distributed evenly throughout the chest. The Sports Harness is machine washable.