Ideal for dogs who suffer from arthritis, ill pets, young puppies, or those dogs who simply enjoy extra warmth. Each thermal bed, mat and mattress contains a foam layer that is backed with reflective foil. This layer is surrounded by quilted polyester fibres and the beds main fill. This allows the bed to reflect body heat and keep your dog warm. Added insulation is provided from the polyester layer that is covered by soft fleece that holds warm air. All beds feature a non-slip cover and are machine washable.