Simple, low wattage, gentle warmth, and ultimate comfort guarantees this bed to be a home run with any cat! The Mod Half-Pod has a unique bowl design will be a sure hit with any indoor cat. The included 4 watt Pet Bed Warmer is removable for year round use and the removable pillow is machine washable. The exterior is a rugged 600 Denier polyester and the interior is soft lycra. One year limited warranty.