Unique materials of this K&H Pet Products Self-Warming Pet Pad heated cat bed utilize and absorb your pet's own body heat, ensuring a nice warm and cozy place for cat naps and dog snoozes. No electricity required! It's the perfect size (21” x 17”) to place on a chair, bed, on cat furniture, in an outdoor cat house, or take with you on the go. Perfect for inside dog and cat carriers on the way to the vet! It's simple to use and is a machine-washable warming pad for easy cleaning. Double-sided with soft material for the option to flip over for a different color on top. Great for cats and small dogs that need a little extra warmth. Designed by K&H with OVER 25 years of experience in creating safe, innovative, quality products for pets; one-year limited warranty.