Our patent pending Hot & Cold Pet Bed provides both cooling relief to an over-heated dog, or soothing warmth to a chilled, or arthritic dog. The reusable Hot & Cold Pet Therapy Gel Pack(s) are made with non-toxic, food-grade ingredients and can be cooled in the freezer or warmed in the microwave. Simply slide the Pet Therapy Gel Pack(s) into the reinforced, chew resistant and scratch resistant pockets to provide your pet the desired temperature relief they require. If no therapy is required, leave the gel packs in place, and turn the bed over to provide your pet a relaxing multilayered pillow top comfort. Each pet bed is constructed using a durable 1000 denier Cordura Nylon outer fabric. Each of the rounded corners and pockets of the bed is protected utilizing a 40-ounce truck tarp material creating the ultimate chew and scratch resistant pet bed. Great for crate use too!