Rated 5.0 out of 5
Based on 6 reviews

Unbound 55

From $399.00

SKU: 3-10855-1

Why stop with one trail? The pack designed for thru hiking has an even more ambitious sibling.

55L PACK, IDEAL FOR

  • Long Distance Backpacking & Thru Hiking
  • Any Environment
FREE SHIPPING ON ORDERS OVER $200
UNBOUND THRU AND THRU

Become UNBOUND to go bigger for longer! The UNBOUND 55 expands your capacity for more adventurous trips by adding extra volume to accommodate seasonal clothing and gear changes, or more food and water when resupply points are fewer or farther in-between. There is simply no better way to measure the effectiveness of a pack design than to send it out on thru hikes. Over the course of 2,000+ miles and an average of five to six months, day in, day out, loaded and unloaded, jostled and dragged, and exposed to the elements, one of these long walks is going to tell you the truth. So, that’s what we went after, and the Unbound 55 is the honest to goodness result. Every carefully considered feature fought for its right to remain, leaving only the essentials required for an efficient, comfortable, adaptable, and dependable travel companion. Thru hiking is hard enough. Let the Unbound 55 carry some of the weight.

Hyperlite Unbound 55 in the Field

WHY CHOOSE THE UNBOUND 55?

WHY CHOOSE THE UNBOUND 55?

Key Feature

ACCESSIBILITY ON THE MOVE

Large dual-entry front external pocket for quick grabs without needing to dig through everything inside. Generously sized side pockets and a stretch bottom pocket add even more storage options.

Key Feature

MAKE IT YOUR OWN

Low-profile daisy chains allow countless ways to carry external items for different kinds of trips. Remove or add top-side compression straps depending on needs, or shock cord for oddly shaped gear.

Key Feature

BUILT TO GO THE DISTANCE

With a strength-to-weight ratio that makes it the strongest fiber in the world, we choose made in the USA, bio-based Dyneema Composite Fabrics to create a pack that will get you to your trail's terminus and beyond.

FEATURES

  • Top Closure:Roll-top closure system with removable side compression straps for customizable compression
  • Hip Belt:Updated removable hip belt provides more cushion and the ability to customize your pack fit. Made using Hardline with Dyneema with 1/8" closed cell rigid foam, 3/8" closed cell foam, and spacer mesh
  • Back:Integrated 1/8" high-density foam and shaped plastic PE sheet to give additional structure to the pack and complement the stay's load transfer
  • Loops:Grab Loop
  • Side Straps:Straps: Removable side compression straps allow for a modular compression system which attaches to integrated daisy chains.
  • Top Compression Straps:Top Y-Strap compression straps designed to secure gear
  • Shoulder Straps:Hardline with Dyneema shoulder straps made with 3/8" closed cell foam and spacer mesh
  • Sternum Straps:Updated sternum strap allows for easy adjustments along shoulder strap daisy chains
  • Buckles/Bungees:New 5/8" hardware minimizes weight without sacrificing durability
  • Stays:Single lightweight aluminum stay provides load transfer to hips
  • Sealing:Seam tape on all vertical side seams and behind all sewn-on pack features.
  • Pack Accessory Options:Shoulder Pocket, Versa, Stuff Sacks, and Pods
  • Daisy Chains:Four 1/4" daisy chains provide innumerable options for lashing gear compressing the backpack.
  • Compatible With:Pods, Dawstring or Roll-Top Stuff Sacks, Stuff Sack Pillow, All Hyperlite Mountain Gear removable Hip Belts
  • Front External Pockets:Large dual-entry front pocket provides significant storage as well as streamlined access to smaller items (i.e. tent stakes) without the need to dig/empty the pocket fully. Made from an extremely durable Dyneema Stretch Mesh
  • Side External Pockets:Oversized Side Pockets allow for streamlined access to water bottles and other gear on the go
  • Bottom External Pocket:Bottom pocket features an extremely durably and stretch dyneema stretch mesh, allowing for quick access to additional storage on the go. Ideal for easy access to snacks or a quick place to store your rain jacket.

SPECS & DIMENSIONS

  • MaterialsWhite: DCH50 Main Body, DCH150 Lumbar & Bottom Panel, Dyneema Stretch Mesh Front and Bottom Pockets, Hardline with Dyneema Side Pockets | Black: DCH150 Main Body, Lumbar & Bottom Panel, Dyneema Stretch Mesh Front and Bottom Pockets, Hardline with Dyneema Side Pockets
  • Internal Volume55L | 3400 cu in
  • External Volume9L | 549 cu in.
  • WeightWhite: 1.9 lbs | 31 oz | 879 g | Black: 2.15 lbs | 34.4 oz | 975 g *Average weight based on size medium
  • Load CapacityUp to 40 lbs
  • Back Width10" | 25.4cm
  • Height38" | 96.52cm
  • Top Circumference40" | 101.6cm
  • Bottom Circumference35" | 88.9cm
  • Made InMexico

WHY CHOOSE THE UNBOUND 55?

Key Feature

ACCESSIBILITY ON THE MOVE

Large dual-entry front external pocket for quick grabs without needing to dig through everything inside. Generously sized side pockets and a stretch bottom pocket add even more storage options.

Key Feature

MAKE IT YOUR OWN

Low-profile daisy chains allow countless ways to carry external items for different kinds of trips. Remove or add top-side compression straps depending on needs, or shock cord for oddly shaped gear.

Key Feature

BUILT TO GO THE DISTANCE

With a strength-to-weight ratio that makes it the strongest fiber in the world, we choose made in the USA, bio-based Dyneema Composite Fabrics to create a pack that will get you to your trail's terminus and beyond.

Features

  • Top Closure:Roll-top closure system with removable side compression straps for customizable compression
  • Hip Belt:Updated removable hip belt provides more cushion and the ability to customize your pack fit. Made using Hardline with Dyneema with 1/8" closed cell rigid foam, 3/8" closed cell foam, and spacer mesh
  • Back:Integrated 1/8" high-density foam and shaped plastic PE sheet to give additional structure to the pack and complement the stay's load transfer
  • Loops:Grab Loop
  • Side Straps:Straps: Removable side compression straps allow for a modular compression system which attaches to integrated daisy chains.
  • Top Compression Straps:Top Y-Strap compression straps designed to secure gear
  • Shoulder Straps:Hardline with Dyneema shoulder straps made with 3/8" closed cell foam and spacer mesh
  • Sternum Straps:Updated sternum strap allows for easy adjustments along shoulder strap daisy chains
  • Buckles/Bungees:New 5/8" hardware minimizes weight without sacrificing durability
  • Stays:Single lightweight aluminum stay provides load transfer to hips
  • Sealing:Seam tape on all vertical side seams and behind all sewn-on pack features.
  • Pack Accessory Options:Shoulder Pocket, Versa, Stuff Sacks, and Pods
  • Daisy Chains:Four 1/4" daisy chains provide innumerable options for lashing gear compressing the backpack.
  • Compatible With:Pods, Dawstring or Roll-Top Stuff Sacks, Stuff Sack Pillow, All Hyperlite Mountain Gear removable Hip Belts
  • Front External Pockets:Large dual-entry front pocket provides significant storage as well as streamlined access to smaller items (i.e. tent stakes) without the need to dig/empty the pocket fully. Made from an extremely durable Dyneema Stretch Mesh
  • Side External Pockets:Oversized Side Pockets allow for streamlined access to water bottles and other gear on the go
  • Bottom External Pocket:Bottom pocket features an extremely durably and stretch dyneema stretch mesh, allowing for quick access to additional storage on the go. Ideal for easy access to snacks or a quick place to store your rain jacket.

Product Walkthrough | Unbound 55

Product Reviews and Questions

average rating 5.0 out of 5
Based on 6 reviews
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Customer photos and videos
Review posted
Reviewed by Gareth T.
Verified Buyer
Rated 5 out of 5

Unbound 55

Walked the AT last year and wanted a Hyperlight rucksack

Now I have the perfect size for future thru hikes

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Reviewed by Brett
Verified Buyer
Rated 5 out of 5

I love this!

So, I'm not a thru-hiker... yet. But, I've been hiking over 20 years with mainly Osprey bags (which I still love). However, I just got my feet wet with the more UL gear that's out there, this pack being one of them. And this Unbound 55 carries all the gear very comfortably! Surprisingly comfortable! All the straps are narrower than what I'm used to, but still feels great! I'm starting the Long Trail soon to prep for my AT thru next spring. And this is the bag of choice. I've now put 20 miles on this bags since I got it a couple days ago. I have no doubts on this bag carrying my gear for my upcoming long distance hikes! Nice work HMG!

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Reviewed by Brandon
Rated 5 out of 5

Unbound in the 100 mile wilderness, Maine

Pack held up through rain for 8 days heavy rain with no issues. The front pockets around the waist belt aren’t water resistant. Overall the pack is awesome… obviously light wait but also ran into no issues carrying 8 days of food and gear (roughly 20-25 lbs) through remote wilderness and had no issues with straps, buckles etc. the frameless design is awesome. Would definitely recommend for any thru hiking.

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Reviewed by R. E.
Verified Buyer
Rated 5 out of 5

Review from a new to ultralight hiker

Long time hiker and "force marcher", which is military for "hiking". With the exception of the pack I had in the military, I've always used frame packs with lots of padding and support structure and been fearful of the ultralight packs because they might be as uncomfortable as my frameless military pack. Since my wife and I decided to hike the AT next year and I started looking at weights, I took a chance after a lot of research and review and ordered this pack. The site showed 1 to 2 weeks lead time. Well, it shipped two days later which made my day!! I received the pack a couple days later, unboxed and inspected it. It's built very well and sturdy. Not a stitch out of place. Packed it with 15lbs and took off on a shake down. The pack actually fits me better than the pack I already had. After a bit of adjusting, I got it settled and was surprised at how well it fit and felt. No rubs, raw spots, soreness or issues. Since then, I've put about 40 miles on it with ~20lbs in it and it's still out performing my framed pack. No issues so far. Haven't been rained on so don't know about weather resistance yet, but can update later once I know. To sum up, this has so far been a very good purchase as it actually fits better than my framed pack, performs as well or better and weighs 3 pounds less. I'm very happy with this so far!!

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Review posted
Reviewed by Brant B.
Verified Buyer
Rated 5 out of 5

Great updates in comparison to the SW 3400

I took the SW 3400 on the PCT and CDT and absolutely loved that pack but needed a new one. From what I can tell in the early use of the Unbound 55, all the differences in design are nothing but positives and it carries as comfortably as my SW did. Smart changes HMG!

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