Utilizing the same heat-reflecting technology found in Mylar space blankets, the Aspen Pet¨ Self-Warming Rectangular Lounger is lined with a layer of material that generates warmth by reflecting your pet s own body heat radiates back the warmth to the source. Covered with soft, faux lambswool plush and wide wale corduroy fabrics for added comfort and warmth. Each bed comes with a non-skid bottom that provides stability to keep it from slipping around. Product Note: This is not an electric bed. No plug or electricity needed.