Velvet microfiber fabric. Orthopedic foam base for extra comfort and joint relief. Foam is medical grade cone and valley/egg crate design. Air flows through to keep pets cool and comfortable. Removable, reversible tufted top cushion; one side is microfiber and the other is tipped berber. This Ortho Sleeper Pet Bed features a tufted reversible cushion for two beds in one. The cushion and bolsters contain polyester high loft that offers added comfort and support for elderly or arthritic animals by providing relief for hips and pressure points.. . . . . Cushion can be used as another bed or placed in a crate. Bolster cushion acts as built-in support across the back and sides. Zippered, removable cushion cover. Machine washable.