Simms Tributary Hip PackMobile gear storage made for your every move, the rugged Tributary Hip Pack offers ample storage, multiple carry options and a smart feature set for full days on the water. Recycled 600 denier polyester fabric with polyurethane coating is rugged and dependable. Main compartment with stretch mesh internal pocket is accessed via U shaped zipper. Additional accessory pocket accessed via zipper on face of pack. Loop field for fly lure drying and storage.