Rated 4.9 out of 5
Based on 27 reviews

Unbound 55

From $399.00

SKU: 3-10855-3

Designed for on-trail backpacking prioritizing mobile storage and accessibility. This 55L pack is great for the on-trail backpacker or all-day thru hiker devouring miles.

DESIGNED FOR: Thru hiking, On-the-go Accessibility
GOOD FOR: On-trail backpacking, section hiking 
WEIGHT: 30.2oz | 856g (Med/White), 34.1oz | 967g (Med/Black)

PRIMARY FEATURE SUMMARY

Incorporating the latest on-trail features for the on-trail backpacker or sunup to sundown thru hiker, this pack prioritizes mobile storage and easy accessibility for the hiker devouring miles. Primary features include:

  • Dual-entry stretch mesh front pockets
  • Large and easy-to-reach side pockets for water bottles or gear
  • Bottom stash pocket with trash port
  • Removable hip belt for swap-out amidst thru-hike weight loss
  • Single-stay suspension with sewn-through back panel
  • White pack is 50-denier DCH fabric, Black pack is 150-denier
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, Drawstring 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
    Black: DCH150 Main Body
    White & Black: DCH150 Lumbar & Bottom Panel, Dyneema Stretch Mesh Front and Bottom Pockets, Hardline with Dyneema Side Pockets
  • Internal Volume55L
  • External Volume9L
  • WeightWhite: 30.2oz | 856g
    Black: 34.1oz | 967g
    *Average weight based on size Medium
  • Load CapacityUp to 40lbs
  • Back Width10.0" | 25.4cm
  • Height (Fully Unrolled)38.5" | 97.8cm
  • Top Circumference40.0" | 101.6cm
  • Bottom Circumference35.0" | 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, Drawstring 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 Video | Unbound 55

Product Reviews and Questions

average rating 4.9 out of 5
Based on 27 reviews
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Customer photos and videos
Review posted
Reviewed by Charles C.
Verified Buyer
Rated 4 out of 5

Break in on the AZT, a solid 4.5+ stars

We're 2 weeks in on the AZT so I'm getting to know the unbound 55. I was leary of the stretch mesh and side elastic cord retention system but it's proven to be highly functional and largely secure. The cord can be restrung to different pack loops which I did to hold 1 Liter smart water bottles better. Bottles stay put unless really bending over but not sure any pack could do that consistently. The stretch mesh can take a lot of day use stuff minimizing the need to open the top most of the day. You do have to watch a bit as when the pack is less than full as the tension to hold things in the mesh is less. Nothing's dropped out but just something to watch.

The hip pockets are large and hold a days worth of snacks, chapstick and small sun block. I do feel like I have to twist my torso to see and get things out of those pockets but maybe that's because I was high in the small pack range but not quite a medium.

The strap system and harness are a bit spartan is the only critique. It synches up well and carries higher range weights ok but it's not plush.

This is a great, maybe fantastic, on the go access pack for those not ready to get super small like Nashville or palente.

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Review posted
Reviewed by Robert L.
Verified Buyer
Rated 5 out of 5

Has everything you need and more..

On the AT right now and I’m loving this pack. Keeps things that need to stay dry - dry.. The two side pouches - one carrying my tent and other water/more essentials -are just that. A LOT of stretch fabric on this pack lets you stuff the rest. Do find myself tightening the waste strap during the day but not enough to be a nuisance. Overall very happy with this pack - would recommend.

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Reviewed by John M.
Verified Buyer
Rated 5 out of 5

40 or 55?

Both the 40 and the 55 are stellar ultralight backpacks: comfortable, durable, waterproof, excellent design and easy to carry for long miles. Which one to get? The obvious answer is "depends on how much gear you are humping." If you need the capacity of the 55, go for it. The less obvious answer turns on whether you are carrying a bear canister. If yes, get the 55. It will carry a BV 475 or a GrubCan canister sideways or vertical with little difficulty and accommodate all your other gear as well. With the 40, I typically ended up with the canister outside the pack on top, often carrying the food stuffed in interstices inside to help with balance and then repacking at night for storage away from camp. Since I carry the GrubCan as a routine, if I could only have one pack it would be the 55. Hope this helps with your choice...

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Reviewed by Catherine T.
Verified Buyer
Rated 5 out of 5

Outstanding on the Overland

Just came back from hiking 6 days on the Overland Track in Tasmania and could not be happier with this pack. It was perfect through torrential rain all the way through to high humidity and heat. Everything worked and packed seamlessly. Highly Recommend. The pods and sleeping bag were also exceptional.

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Reviewed by YOSHIHISA M.
Verified Buyer
Rated 5 out of 5

Unbound 55 is the best!

It's well made, so it's comfortable to carry heavy items on your back.

If you remove the frame and waist belt, it weighs 650g.

This is very convenient when you don't have much luggage, such as in the summer.

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