Skip to product information
1 of 41

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

Regular price HK$3,160.00
Regular price Sale price HK$3,160.00
Sale Sold out
Shipping calculated at checkout.
Color
Capacity
Size

In Stock

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.

---

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.

---

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

View full details