Round or dome-shaped doghouses have been a best seller for years and the K&H Igloo Style Heated Pad is the answer to provide warmth for the animals using these homes. It's half round shape fits easily through the door of the home and allows for the pet to stay on or off the heated surface. The Igloo Style Heated Pad provides reliable, affordable comfort. Indoor or outdoor use. This heated dog pad has been d & certified by MET Labs to exceed USA/CA electrical safety standards. Available in multiple sizes. One year limited warranty.