"Get instant heat in any chair! Just place a heat pack (not included) inside the OZTENT HOTSPOT Lumbar Pack, add it to your favorite camp chair, and enjoy warm relief. It can also be worn around the waist with a HOTSPOT Pouch (not included) to keep the body warm through winter. Plus, you can use it with ice packs (not included) in the summer, too. The insulated front ensures heating or cooling is directed primarily to your body, rather than being lost to the elements. A large pouch with a headphone cord outlet stores accessories. Keep your phone, wallet, and keys in a warm and secure location while you go about your duties. Fits most chairs. Front is made of 100% neoprene, and the back is made of 420-denier, 100% nylon. Mfrs. 1-year warranty.Manufacturer model #: OHS01LULPA. Front: 100% neoprene Back: 420-denier, 100% nylon Can be strapped to any chair or around your waist Add a heat or ice pack into the pocket for relief Insulated front directs heating and cooling to your body Large accessory pouch with headphone cord outletSpecs: 14.2""L x 5.5""W x 1.6""H Weight: 3.9 oz."