Its soft fleece and walls will surround any pet with snuggle comfort and security. Great for animals who love to nest while they sleep. Removable 4 watt heater adds warmth to take the chill off on cold days. Energy efficient 4 watt heater included. Machine washable. Recommended for indoor use. Soft and comfy fleece surround Perfect for your small cat or dog Removable heater Machine washable MET listed