Serenity Memory Foam Dog Bed Features Ortho High Resilient Foam base and Memory Foam chip filling for an unbeatable combination of softness and support Unique interior channels keep the chips in place; helping to prevent shifting and/or flattening Liner under the cover greatly reduces the absorption of odors Quality microfiber and ultra-dense Sherpa fleece cover is removable and machine washable Eco-friendly Made from recycled Memory Foam chips