The Silver Tails 58303 Rectangular Bed Topper, Large/Extra Large, offers holistic material that reacts with the pet's own body heat to effectively eliminate odor, absorb moisture, and promote improved blood circulation. Bed Covers offer a waterproof lining. Machine washable cover and hand-washable inner lining. Product Details: Bamboo Charcoal Insert. Rectangular Bed Cover with Charcoal Insert. Silver Tails Senior Pet Products. Premium Pet Bed Cover. Protective: Machine Washable Waterproof Cover. Relieves: Joint & Increases Flexibility. Purifies: Your Pet's Environement with Bamboo Charcoal Fibers. Absorbs: Dampness & Eliminates Odors. Size: Large / X-Large Dimensions: 45" x 35"