The Chums Boom Box Waist Pack is designed for the modern commuter. This Chums hip pack has a built-in fleece-lined muff for warming your hands on cold mornings. It has a spacious internal compartment with extra pockets for your cash and cards, along with reflective, external bungee straps to hold additional gear. The cell-phone sleeve with earphone portal offers easy access to your electronics. The Chums Boom Box Waist Pack has a slip-through adjustable waist strap and is ideal for urban commuters, hikers, and travelers. Imported. Cancer and Reproductive Harm- www.P65Warnings.ca.gov. Type: Waist Packs.