Dogbed4less Heavy Duty Orthopedic Gel Memory Foam Pet Bed with Waterproof Internal Case + 2 Washable Canvas External Cover for Large Dog Luxury 55" L X 37" W X 4" in thickness 100% solid therapeutic memory foam pad, secured by a waterproof internal zipper cover and 2 external durable washable canvas cover in olive green color. The 2nd free external cover is a great replacement during the time you need to clean the cover. 2 Layers of zipper Covers protection: Waterproof Taffeta fabric internal cover and 2 heavy duty 100% cotton made canvas fabric external cover with hidden zippered eyelid design plus extra stitching boasts longer lasting quality and easy to wash by machine. High quality gel infused cooling memory foam never loses its shape, providing many years of cozy comfort in relieving the pain of arthritis, joint and hip dysplasia. It can also contours to the body for true orthopedic support. Unlike other brand with multi-layer glued partial memory foam, we do not cut corners and only offer 3.2lbs high density 100% memory foam similar to high end therapeutic mattress stores to promote better sleep, healthy joint and long lasting. Dogbed4less pet bed offers the perfect combination of support and comfort in balance with superior durability while ensuring the body is properly aligned without painful pressure points that can lead to tossing and turning. Try it yourself and you will love it too!