Being soft squishy warm and comfy the K&H Pet Products Microwavable Pet Bed Warmer is the only one of its kind. Unlike those hard discs the K&H warmers are soft and squishy when warm. Its simple to use just minutes in the microwave is all it takes. Great for indoor or outdoor use for cats dogs and any animals that need a little extra warmth in the winter. The non-toxic warmer is safe and stays warm for up to 12 hours inside a pets bed. Simply microwave it as needed for anytime warmth for your pet. Hand wash with soap and water. Designed by K&H Pet Products with OVER 20 years of experience in creating safe innovative quality products for pets; one year warranty.