Five-layer Heat Preservation Design: Our self-heating pad is filled with a 5-layer structure and 3 layers of heat-generating and warm-keeping materials, which are better than those on the market. Self-heating Pet Bed: Such pad can effectively keep your pet warm in cold weather. It is ideal for cats, rabbits, puppies, aging and arthritis pets. This pad is very suitable for use in sofas, floors, dog beds, cat habitats, pet carriers and outdoor cat houses. Multi-size pad can be easy to clean, machine washable and hand washable. Safety Guarantee: No battery or cable is needed, this kind of automatic heating pet blanket can reflect and retain the pet’s own heat, making them warm and comfortable.