Zentek coats are designed for the athlete and the lay-about dog. Dogs wear them in all types of weather and doing all types of activities. The coats are designed to be worn both at rest and at play. The coats regulate the temperature of the dog. When the surface of the dog reaches 83 degrees, it pulls the heat away from the dog. If properly cared for, our coats will last 10 years, which makes them a great investment!