K&H Mfg Heated Snuggly Sleeper Your pet will be safe and warm with the UL-listed Thermo Snuggly Sleeper. Dual thermostats provide the perfect amount of pet-pleasing warmth while offering you the safety and efficiency of a low wattage heater. Because of its unique design, the entire cover is washable. One year limited warranty. Recommended for indoor use Uses only 6 watts Average monthly electrical cost is ONLY 15 cents!!! Removable heater, washable covers Available in 2 sizes: Medium 26" x 20" and Large 31" x 24" and 2 colors: Mocha and sage Warms to pet's normal body temperature when in use UL Listed 1 year warranty How do they work? K&H's low wattage, pressure sensitive heating elements heat their beds to approximately 15 above room temperature when unoccupied and to 102 (a dog or cats normal body temperature) when occupied. That's what makes them so appealing to pets and energy efficient. This bed is so energy efficient that the average monthy electrical cost is only 15 cents!!!