Choose from available sizes. Made of microfiber and polyester. Orthopedic foam relieves pressure on joints. Cover is velvet microfiber with plush sherpa. The Carolina Pet Company Ortho Bolster Pet Bed boasts a thick and soft orthopedic foam base that cushions your pet's joints as they snooze. The raised ridge along the back provides supportive structure. Velvet microfiber and plush sherpa fabric make the cover feel invitingly soft. Size: Large. Color: Chocolate.