Hyperlite Mountain Gear
In Stock: 2026 Latest Hyperlite Mountain Gear (HMG) Unbound Backpack, 40L & 55L Capacity, Lightweight Backpack
In Stock: 2026 Latest Hyperlite Mountain Gear (HMG) Unbound Backpack, 40L & 55L Capacity, Lightweight Backpack
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Product Description
Redesigned for long-distance hikers and thru-backpackers, the Unbound 40 and 55 have been upgraded with the ultra-durable Dyneema® Woven Composite Fabric 3.9, making them lighter, tougher, and more comfortable. Two ergonomically curved removable stays, an improved hip belt, and wider, more naturally contoured shoulder straps provide enhanced support and comfort when carrying heavier loads. The streamlined construction, combined with internal seam taping and low-profile sewn 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 field-tested features like dual-access front pockets, bottom pockets, V-pull hip belt tensioners, and easy-access side water bottle pockets remain intuitive and efficient.
Key Features:
· Lighter Weight: Featuring the all-new Dyneema® Woven Composite Fabric 3.9, the upgraded Unbound 40 and 55 are lighter than the original versions while providing superior trail performance and comfort.
· More Support: Two ergonomically curved removable stays provide increased support when carrying heavier loads; the redesigned wider shoulder straps feature a more natural contour for a better fit.
· Streamlined Look: The new improved construction allows the interior of the pack to be seam-taped, eliminating the need for external binding; new low-profile and user-friendly sewn webbing loops result in a cleaner appearance.
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Features
Top Compression Strap
Top Y-strap compression design can be used to secure gear.
Shoulder Straps
Redesigned shoulder straps feature an adjusted shape that creates a more natural curve around the neck for enhanced comfort. Denser stitch reinforcement points provide more sternum strap adjustment options, allowing you to achieve a perfectly customized fit.
Front Exterior Pockets
Dual-access Dyneema stretch mesh front pocket keeps your gear organized and easily accessible.
Side Exterior Pockets
Large and easily accessible side pockets allow you to quickly grab water bottles or other essentials while on the move.
Webbing Loops
Low-profile vertical and horizontal webbing loops allow you to attach additional gear and customize the pack for specific trips.
Compression System
Roll-top closure system combined with removable side compression straps allows for adjustable compression to accommodate varying load volumes.
Hip Belt
Removable hip belt provides better padding and allows you to fine-tune the fit of the pack for optimal comfort.
Back Panel
Integrated foam back panel provides structural support to ensure comfortable carrying.
Stays
Two removable, ergonomically curved aluminum alloy stays provide support and help distribute heavy loads. The stays can be removed to further reduce weight.
Tie-downs
Removable elastic tie-downs secure long items in the side pockets, keeping them stable and compressed.
Top Closure
Removable roll-top closure system combined with vertical compression straps allows you to adjust the pack volume, keeping the load compact, stable, and weather-protected.
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Specifications
40L Pack
· 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 Fabric 3.9, 100D Dyneema® Gridstop, Dyneema Stretch Mesh
Back Width
10.5 in | 26.7 cm
Height (Fully Expanded)
32.5 in | 82.6 cm
Top Circumference
36.5 in | 92.7 cm
Bottom Circumference
36.5 in | 92.7 cm
Country of Origin
Mexico
Weight is for Size M
55L Pack
· 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 Fabric 3.9, 100D Dyneema® Gridstop, Dyneema Stretch Mesh
Back Width
10.5 in | 26.7 cm
Height (Fully Expanded)
36.5 in | 92.7 cm
Top Circumference
41 in | 104.1 cm
Bottom Circumference
36.5 in | 92.7 cm
Country of Origin
Mexico
Weight is for Size M
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