Hyperlite Mountain Gear - Unbound 55 UPDATED

Redesigned for thru hikers and long-distance backpackers, the Unbound 40 and 55 are lighter, stronger, and more comfortable thanks to an updated build with the exceptionally durable Dyneema® Woven Composite 3.9. Two contoured removable stays, a refined hip belt, and wider, more naturally curved shoulder straps improve support and comfort under heavier loads, while streamlined construction with internal seam taping and low-profile sewn-in daisy chains creates a cleaner, more functional design. A fully removable, customizable compression system makes it easier to secure trekking poles or oversized water bottles, while trail-proven features like the dual-entry front pocket, bottom pocket, V-Pull hip belt, and accessible side bottle pockets remain as intuitive and efficient as ever. KEY FEATURES: LIGHTER WEIGHT: With the new Dyneema® Woven Composite 3.9, the updated Unbound 40 and 55 offer better performance and comfort on trail while weighing less than the originals. MORE SUPPORT: Two contoured removable stays provide more support when carrying heavier loads, and redesigned wider shoulder straps feature a more natural curve for a better fit. STREAMLINED LOOK: A new modified construction allows seam taping inside of the pack without the need for the exterior binding, with a new, streamlined and user friendly sewn-in daisy chain. Top Compression Straps: Top Y-strap compression designed to secure gear Shoulder Straps: Redesigned shoulder straps featuring an adjusted shape for a more natural curve around your neck, providing enhanced comfort. More frequent bartacks provide increased sternum strap adjustment options, allowing for a perfectly customized fit. Front External Pockets: Dual entry Dyneema stretch mesh front pocket keeps your gear organized and easily accessible. Side External Pockets: Large, easy-to-reach side pockets allow you to quickly grab water bottles or other essentials while on the move. Daisy Chains: Low profile vertical and horizontal daisy chains enable you to attach extra gear, customizing the pack for specific trips. Compression: Roll-top closure system with removable side compression straps allows for adjustable compression, adapting to varying load sizes. Hip Belt: Removable hip belt offers enhanced cushioning and lets you fine-tune the pack's fit for optimal comfort. Back Panel: An integrated foam back panel provides structure and ensures comfortable carry. Stays: Two removable, contoured aluminum stays offer support and help distribute the load. Stays can be removed for additional weight savings. Lashing: Removable shockcord lashing keeps tall items in the side pockets secure and compressed. Top Closure: Removable roll-top closure system with vertical compression straps allows you to adjust the pack's volume, keeping the load compact, stable and protected from weather. Volume: 55L External Volume: 9L Load Capacity: Up to 40 lbs Weight: 28.9 oz | 819 g Material: Dyneema® Woven Composite 3.9, 100D Dyneema® Gridstop, Dyneema Stretch Mesh Back Width: 10.5 in | 26.7 cm Height - Fully Unrolled: 36.5 in | 92.7 cm Top Circumference: 41 in | 104.1 cm Bottom Circumference: 36.5 in | 92.7 cm Country: Mexico Average weight based on size medium