High quality 100% 47"X29"X4" solid true therapeutic memory foam be able to support your pet up to 180 lbs and will not flat overtime compare to other bed. The memory foam will be firmer when cooler and reacts to body heat and weight, allowing it to mold to a warm body in a few minutes. We use the similar memory foam which sold in high end therapeutic mattress store. Best material to promote better sleep, healthy joint and long lasting. * 2 layer of fabric cover : Internal layer waterproof fabric zipper cover with strong industrial stitch to secure the memory pad. The bed also comes with our 160 gsm suede fabric cover (outside layer) in Tan color for easy cleaning and maintain. Design to fit in 48"L x 30"W crate size or SUV. * The external fabric cover is luxury synthetic Microsuede fabric with zipper in size 47"X29"X4". The external cover is MicroSuede / Faux synthetic Suede fabric for better durability as seen in many luxury blazer or suit jacket . The cover is stains, dirts and wrinkle resistant, re-usable many times and machine washable. Only internal cover is fully waterproof. * To select the correct bed size, please measure the body length from base of tail to tip of nose and then add 5" to 7". Larger bed at XXL or XXXL size, additional color in Denim blue/brown, Canvas green replacement cover or sizes are available at our storefront by clicking on dogbed4less link next to the title. * Buy 2 discount bundle offer : We will ship 1 replacement external suede cover for free in the total shipment if you buy this bed in quantity of 2 (Only 1 free cover for 2 beds purchase). Why spend more money to replace the poly-fill bed regularly while you can get a luxury comfort foam bed that your dog will love and last longer with easy maintain?