Unique materials of this K&H Pet Products Self-Warming Pet Pad 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 (17” x 21”) to place on a chair, bed, a piece of cat/dog furniture, or take with you on the go. Perfect for inside pet 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 the desired color on top. Great for cats and small dogs that need a little extra warmth. Designed by K&H with OVER 20 years of experience in creating safe, innovative, quality products for pets; one-year limited warranty.