The Unbound is Hyperlite Mountain Gear's redesigned thru-hiking pack, built from Dyneema® Woven Composite 3.9 for an ultralight, highly abrasion-resistant carry. This 55L version scales up the design for longer resupply gaps and heavier loads, while keeping the same dual-entry stretch-mesh front pocket, twin side bottle pockets and bottom stash pocket for gear you need on the move. Removable, contoured aluminium stays and a V-Pull hip belt add structure and support, and wider, naturally curved shoulder straps and adjustable roll-top compression straps round out the carry system. Suits thru hikes, multi-day trips and long-distance trails where low pack weight matters most.

Features

• Dyneema® Woven Composite 3.9 main body fabric — puncture and abrasion-resistant, with internal seam taping.
• 100D Dyneema® Gridstop reinforcement in high-wear zones.
• Dual-entry Dyneema® Stretch Mesh front pocket for quick-access, on-the-move storage.
• Large side bottle pockets for one-handed access to water and other essentials.
• Bottom stash pocket for wet or frequently used gear.
• Two removable, contoured aluminium stays for structure and load transfer.
• Removable hip belt with V-Pull cinch system and cushioned padding for heavier loads.
• Roll-top closure with removable, adjustable compression straps for volume control and securing trekking poles or oversized bottles.
• Low-profile, sewn-in daisy chains (vertical and horizontal) for external gear attachment.
• Wider, naturally curved shoulder straps for comfort under load.
• Five torso-fit sizes (XS-Tall) to dial in the carry.
• Taller body than the 40L version for longer resupply stretches and bulkier gear.
• Rated to carry up to 18kg (40lb).

Specifications