Specification: Name:Pets Self Warming Mat Colour:Grey,Khaki Material:heating fibre,aluminium foil composite layer,thermal cotton,plastic non-slip cloth Size: S:36*50*4.5cm/14.17*19.68*1.77inch M:45*70*5cm/17.72*27.56*1.97 inch L:56*90*5.5cm/22.05*35.43*2.16 inch XL:72*115*6.5cm/28.35*45.27*2.56 inch Description: HEATING PRINCIPLE: The heating fibre in the middle of our pet self-heating mat has good heat transfer function and heat storage function due to its special molecular structure, taking the body temperature of the pets as the heat source, the transfer speed is "resolved", and through the upper layer of the warm polar fleece, it achieves the effect of circulating heat and the heat is not easy to be lost. The lower layer of aluminium composite locks in the temperature, keeps out the cold and reflects the heat back to keep the pet warm. The bottom layer is filled with insulation foam, which is thick, soft and warm. The multi-layer thermal insulation keeps your pet warm in winter! Unique design: takes "warmth" to a whole new level without the need for plugs or electricity! Our kennel beds have an innovative self-warming layer made of heat-generating fibres that absorbs your pet's body heat and transfers the energy back to your pet's body, giving a sense of calm and serenity. EASY TO USE: the pet self-heating mat can easily get your beloved pet out of the awkward position of sleeping for a long time without warmth, and is supportive and comfortable for puppies with growing bones, older dogs with arthritis, and people of every age who like to snooze in a cosy place. EASY TO CLEAN: Our dog bed self-heating pad is machine washable and suitable for drying. Its waterproof lining prevents accidents, while the hard-wearing, non-slip bottom holds the dog bed in place and ensures security for your pup. GREAT GIFT: Your pet will enjoy a warm and cosy self-heating experience on cold days, making it an ideal gift for kittens, cats, puppies, dogs and elderly pets. Keep your pet warm on the floor, in the car, in a cage, or on the grass outdoors! package list: 1*Pets Self Warming Mat