Achy Paws - "They'll Love You For It!" Self-Heating/Cooling Wellness Pet Mat. Made with Activated Bamboo Charcoal for warm/cool circulation that helps your pet achieve a state of optimum wellness. Also helps relieve achy joints, reduce soreness, keep them warm in cold weather and vice versa, and also calms restlessness. Incredibly soft, comfortable, and high in absorption of odor & pet dander. Also protects your furniture. Give the gift of wellness and we're sure your pets will love you for it! Available in 5 Sizes: S, M, L, XL, XXL Durable ConstructionTriple-layered thick with fleece outer coverings and 100% bamboo charcoal filling inside. . . .