1.Ergonomic The Yshaped neck allows shoulder movement and minimum breathing constraints. By having the pull force come from the sides the weight is evenly distributed over the entire harness. Padded neck opening for stability and support. 2.Developed by professionals This dog harness is developed, tested, and used by worldleading athletes within dog powered sports such as canicross, bikejoring and skijoring, but applies to any active dog. 3.Adjustable This dog pulling harness is highly adjustable to fit most dogs. Both chest and length can be adapted to your dog's body shape for optimum performance. Please measure your dog according to the description before purchasing your harness. 4.Comfortable There are no hard edges towards your dog's body to prevent chafing and provide comfort. The inner lining is gentle to your dog's coat. All fabrics are durable and not harmful for your dog or nature.