The Hyperlite Mountain Gear Unbound 40L Ultralight Backpack, your ultimate companion for long-distance backpacking on iconic trails like the AT, PCT, and CDT. Crafted meticulously from DCF (Dyneema Composite Fabrics), this ultralight marvel, weighing merely 30.1 oz, is engineered to withstand the rigors of thru-hiking. The Unbound 40L showcases a contoured aluminum stay and a 1/4" foam back panel to offer unmatched comfort on the trail. With a generous internal volume of 40L and an external volume of 9L, it provides ample space for all your hiking essentials. The backpack boasts a load capacity of 40 lbs, ensuring you can carry essentials and more. Available in various sizes (S, M, L, T) and color options (White and Black), it's tailored to fit a range of torso lengths, ensuring a snug and comfortable fit as you venture through diverse terrains. The Unbound 40L's waterproof and indestructible design elements promise durability, while its excellent pockets and good volume adjustability offer a tailored fit for every adventurer. As you traverse through the wilderness, the Hyperlite Mountain Gear Unbound 40L Ultralight Backpack is not just a backpack; it's a promise of enduring performance and relentless exploration.