The Easy Walker is a comfortable harness for your dog. While it allows your dog to move freely, it also ensures it will walk to heel. Various tests have shown that the dog walks at the same pace as its owner once it is wearing the Easy Walker. This product does not have a suffocating effect and will not damage your dog's muscles or upper vertebrae either. So, you can relax as you hit the road with your dog and go for a safe, stress-free walk. The Easy Walker is solid, durable, weather-resistant and friendly on the fur. Available in 4 different sizes (Small - 22-32cm, Medium - 31-39cm, Large - 40-58cm, and Extra-Large - 52-84cm).