EHEYCIGA Orthopedic Memory Foam Dog Beds for Medium Dogs with Removable Waterproof Liner, Brown, 30x20EGG CRATE MEMORY FOAM: The orthopedic dog bed mat from EHEYCIGA features an egg crate memory foam design. The Oeko Tex 100 and Certipur US certified memory foam is bonded with high density foam, providing a combination of softness and strong support. This makes it an excellent choice for senior dogs. WATERPROOF LINER: EHEYCIGA memory foam dog bed has a waterproof liner which effectively protects the memory foam and increases its durability. REMOVABLE