(Pre-order, arriving end of the month) 2026 Latest Hyperlite Mountain Gear (HMG) Unbound Backpack 40L 55L Capacity Lightweight Backpack

Product Description Redesigned for long-distance hikers and thru-hikers, the Unbound 40 and 55 are upgraded with extremely durable Dyneema® Woven Composite 3.9, making them lighter, stronger, and more comfortable. Two ergonomically curved removable stays, an improved hip belt, and wider, more naturally curved shoulder straps enhance support and comfort when carrying heavier loads. A streamlined construction with internal seam taping and low-profile sewn-in webbing loops creates a cleaner, more functional design. A fully removable and customizable compression system makes it easier to secure trekking poles or oversized water bottles, while battle-tested features like the dual-entry front pocket, bottom pocket, V-shaped hip belt pull, and easy-access side water bottle pockets remain intuitive and efficient. Key Features: · Lighter Weight: Featuring the new Dyneema® Woven Composite 3.9, the upgraded Unbound 40 and 55 offer superior trail performance and comfort while weighing less than the original versions. · More Support: Two ergonomically curved removable stays provide greater support when carrying heavier loads; redesigned wider shoulder straps feature a more natural curve for a better fit. · Streamlined Appearance: The new, improved construction allows for internal seam taping, eliminating external binding; new low-profile and convenient sewn webbing loops create a cleaner look. --- Features Top Compression Strap Top Y-strap compression design for securing gear. Shoulder Straps Redesigned shoulder straps with an adjusted shape that creates a more natural curve around the neck, providing enhanced comfort. More dense reinforced stitching points offer more sternum strap adjustment options, allowing you to achieve a perfectly customized fit. Front External Pocket Dual-entry Dyneema stretch mesh front pocket keeps your gear organized and easily accessible. Side External Pockets Large and easy-to-access side pockets allow you to quickly retrieve water bottles or other essentials while on the move. Webbing Loops Low-profile vertical and horizontal webbing loops allow you to attach additional gear, customizing the pack for specific trips. Compression System Roll-top closure system with removable side compression straps allows for adjustable compression to accommodate different load volumes. Hip Belt Removable hip belt provides better padding and allows you to fine-tune the pack's fit for optimal comfort. Back Panel Integrated foam back panel provides structural support for comfortable carrying. Stays Two removable, ergonomically curved aluminum stays provide support and help distribute weight. Stays can be removed to further reduce weight. Lashings Removable elastic lashings secure tall, long items in side pockets, keeping them stable 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 weather-protected. --- Specifications 40L Backpack · Capacity 40L External Capacity 9L Load Capacity Up to 40 lbs (approx. 18.1 kg) Weight 27.3 oz | 773.9 g Materials Dyneema® Woven Composite 3.9, 100D Dyneema® Gridstop, Dyneema Stretch Mesh Back Width 10.5 inches | 26.7 cm Height (fully extended) 32.5 inches | 82.6 cm Top Circumference 36.5 inches | 92.7 cm Bottom Circumference 36.5 inches | 92.7 cm Origin Mexico Weight is the average weight for size M 55L Backpack · Capacity 55L External Capacity 9L Load Capacity Up to 40 lbs (approx. 18.1 kg) Weight 28.9 oz | 819 g Materials Dyneema® Woven Composite 3.9, 100D Dyneema® Gridstop, Dyneema Stretch Mesh Back Width 10.5 inches | 26.7 cm Height (fully extended) 36.5 inches | 92.7 cm Top Circumference 41 inches | 104.1 cm Bottom Circumference 36.5 inches | 92.7 cm Origin Mexico Weight is the average weight for size M