The waterproof Accessory-Pack with 3.5 L volume (214 cu.in.) provides extra space in addition to the Handlebar-Pack. The Accessory-Pack can attach directly to the bars and used by alone, but can also quickly and safely be fixed to the outside of the Handlebar-Pack featuring four adjustable metal hooks. With the supplied shoulder strap it can be carried as a shoulder or hip pack. The small pack weighs only 206 g/ 7.3 oz.