So you want to keep your cats warm even when they decide to stay outside for a while? This Outdoor Heated Cat Shelter has you covered. It is a cat shelter with an integrated heater. You get a 20-watt heater below the floor, which is waterproof. The house is made of 600-denier nylon.
This cat shelter has a roof that overhangs over 4 sides to keep your pet dry during rain showers. It works for cats up to 25 lbs. You can get yours for under $130.