needs only minutes in your microwave & the SnuggleSafe 9" disc will provide your cherished companion up to 10 hours of warmth and comfort. Snugglesafe is used by anyone who cares for pets, which includes pet care professionals. SnuggleSafe will give instant, long lasting warmth wherever its needed. Vets, rescue centers, breeders, kennels, zoos & just about anyone who cares for animals large or small can benefit from the ease and safety of SnuggleSafe's comforting warmth. Ideal for puppies/kittens, convalescing pets and elderly pets with arthritis.