The K&H Memory Sleeper (Medium Mocha 23 in X 35 in X 3.75 in) is a beautiful, affordable way for all dogs to benefit from the memory foam bed technology. The attractive cover is removable for washing. The core is ingeniously designed for genuine memory foam comfort while affording ultimate support for any size dog. While the Memory Sleeper is wonderful for pets with bone, hip or joint problems this bed is also the ultimate in comfort. The top fabric is called b Coralb . It is a very durable material that feels like a soft velvet. The mocha colored fabric is called TC Fabric. This is a Polyester Cotton blend that is also extremely durable.