The Scruffs Thermal, self-heating pet beds are an ideal choice to keep your pet warm on those cold winter nights. Each bed contains a foam layer, backed with reflective foil. This layer is sandwiched between quilted polyester fibres and the beds main fill, it reflects body heat back to your pet, keeping them warm. The quilted polyester lies beneath a super soft fleece cover, and this layer holds warm air around your pet providing added insulation. This bed is particularly suitable for pets who suffer from arthritis, young and ill pets or just those that enjoy the extra warmth provided. These are machine washable and have a non-slip base.