Ideal for long hikes, the AO AB-0747 has a 60L capacity and is hydration system compatible. You won't need to pause your hike to dig through searching for essentials-- 7 compartments line the outside of the bag, plus 2 easily accessible hip belt pockets means everything you need is within arm's reach. D-rings on the straps and 3 flaps along the bottom means everything connects, no need to carry a second bag! Compact for easy carry with eleven compression straps. Comes with a detachable stow-a-way rain cover. Made to keep your focus on the adventure, not on what you're carrying.