Story A pack made to haul all your gear across the longest trails With a spacious 40 L capacity and rigorous design, the Unbound Hiking Backpack was made for day-in, day-out use on the trail. Built from ultralight Dyneema® fibers (an incredible material that’s lighter than Silnylon and stronger than Kevlar) and loaded with features, this pack has been trail-tested over 2,000+ miles to ensure it can keep up with whatever rugged backcountry environment you venture into. Features Comfortable and dependable 40 L backpack with thru-hike capabilities Made from ultra-durable hardline with Dyneema® fabric Large dual-entry front external pocket for quick access without unpacking Generously sized side pocket for added storage Stretch bottom pocket provides additional organization Low-profile daisy chains for attaching gear to the outside of your pack Water-resistant seam taping keeps your gear dry and secure Roll-top closure with removable side compression straps Comfortable shoulder straps made from closed-cell foam Durable, lightweight buckles can handle backcountry use Removable hip belt is adjustable and comfortable Quick access grab loop Materials Body: DCH150, DCH50 hardline with Dyneema® Made in Mexico Specs Volume: 40 L (all sizes) Weight: 2 lbs Load Capacity: 40 lbs Back Width: 10” Height (unrolled): 32½” Top Circumference: 35” Bottom Circumference: 35” Sizing Not sure what size you need? Check out this comprehensive size guide and video from Hyperlite Mountain Gear to find the right fit. Small: 15” - 17” torso Medium: 17” - 19” torso Large: 19” - 21” torso Tall: 21”+ torso