Being soft, squishy, warm, and comfy, the K&H Microwavable Pet Bed Warmer is the only one of its kind. It's simple to use, just minutes in the microwave is all it takes. The non-toxic warmer is safe and stays warm for up to 12 hours inside a pet's bed. simply microwave it as needed for anytime warmth for your pet. Hand wash with soap and water. One year warranty.