The Scruffs Thermal Self-Heating dog blanket uses the same proven technology as Scruffs Thermal coats to offer warmth to your dog's muscles on those chilly winter evenings. Each blanket has a foam layer with luminous foil backing. This layer reflects your pet's body heat back to keep them warm. Inside the blanket, a quilted hollow fibre layer keeps warm air around your pet, offering additional insulation. The Scruffs Thermal blanket may be used on its own, in conjunction with an existing pet bed, or inside a pet carrier.