The K&H Self-Warming Lounger has been a best seller for many years. This economical self-warming bed features a durable yet stylish poly/cotton exterior with a soft comfortable micro-fleece sleeping surface. Talk about comfort! The pillow type sleeping surface has a layer of metalized insulation that radiates warmth generated from your pets own body heat. How simple is that? The K&H Self-Warming Lounger is filled with premium polyfil made from recycled plastic bottles and is completely machine washable. This great product even features a stay-put nonslip bottom for stability. Doesn't your pet deserve the best?