KH Mfg Heated Crinkle Cat Sack Sage

K&H Mfg Heated Crinkle Cat Sack Thermo Crinkle Sack is the perfect play and sleep spot for any age cat. With built-in noisy walls, all cats find it as irresistible as that paper grocery bag left on the floor. With its plush interior and soft heated floor, it's bound to be kitty's favorite sleeping den as well. Pop the energy efficient 4 watt heater out for year round fun and comfort. Average monthly electrical cost is ONLY 8 cents!! Machine washable Indoor use only Limited one year warranty Colors: Mocha Sage Size: 15" x 12" 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 8 cents!!!