Nac Pak 3L Hydrapak. The proven Nac Pak is redesigned for bigger days of riding with enhanced ergonomics to keep you going longer. With the perfect combination of cargo capacity, accessory carrying capacity, an included 3-liter hydration bladder, quick access and intelligent tool storage, the Nac Pak 3L Hydrapak is the bag riders continue to rely on. The Nac Pak carries your essentials for a full day outdoors or even a textbook and a small laptop for class. Medium sized powersports backpack. Removable water-resistant tool pak. External shovel and probe storage. Large enough for small / medium sized laptops. 3M™ Scotchlite™™ reflective material. New race-inspired shoulder straps integrated into sternum and side straps (NO hip belt). Back panel is molded and vented. Custom glove-friendly zipper pullers. Goggle chamois in molded goggle pocket.