Unbound 40 - Seconds
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.
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.
- Volume 40L
- External Volume 9L
- Load Capacity Up to 40 lbs
- Weight 27.3 oz | 773.9 g
- Material Dyneema® Woven Composite 3.9, 100D Dyneema® Gridstop, Dyneema Stretch Mesh
- Back Width 10.5 in | 26.7 cm
- Height - Fully Unrolled 32.5 in | 82.6 cm
- Top Circumference 36.5 in | 92.7 cm
- Bottom Circumference 36.5 in | 92.7 cm
- Country Mexico
Average weight based on size medium
To maximize the performance of your Hyperlite Mountain Gear products and ensure that they live a long, reliable, and productive life, we recommend that you familiarize yourself with their Care Instructions.
CARE INSTRUCTIONSTop 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.