"This one of a kind therapeutic pet bed provides both cooling relief to an over-heated pet, or soothing warmth to a chilled, or arthritic pet. The time tested Non-Toxic (FDA Approved) gel packs can be cooled in the freezer or warmed in the microwave. Simply slide the gel packs 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 multi-layered pillow top comfort. Each pet bed is constructed using a tough 1000 denier Cordura Nylon outer fabric. The inside is made using a 10 once fiberfill batting and 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. Includes: 18"" x 24"" pet bed with one reusable Hot & Cold Pet Therapy Gel Packs."