Memory foam: Made with a 2" thick layer of memory foam. Colour: Grey. Removable cover: The zip cover is removable and washable. Sizes: Extra small 18" x 24" | Small 20" x 30" | Medium 24" x 36" | Large 28" x 42". Orthopaedic: Double sided and provides great support for your dog. Comfort: Thick padding for a warm and comfortable place to rest. Dog bed: Get a luxury memory foam orthopaedic dog bed. Orthopaedic Memory Foam Dog Bed | Living Social | Living Social