Hyperlite Mountain Gear

Unbound 55L


The Ubound 55L is 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.

Primary Features

  • 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


  • weight: 879g *average weight based on size medium
  • load capacity: up to 18kg
  • back width: 25.4cm
  • height: 96.52cm
  • top circumference: 101.6cm
  • bottom circumference: 88.9cm


Fits Torso Length 
S: 15.0 - 17.0 inches
M: 17 - 19 inches
L: 19 - 21 inches
Tall: 22+ inches

Fits Waist/Hips
M: 27.5 - 50 inches
L: 29.5 - 52 inches
Tall: 29.5 - 52 inches

Shipping Information

Our on-line store is open 24/7 and we ship Monday through Friday, excluding some holidays. Orders received for products without shipping restrictions on its product page will ship the same business day when received before 12:00 p.m. PST. Orders in high demand will have an estimated production time listed on its product page and will ship according to the date listed.

About Us

Who we are

"Established in 1968 as Southern Cross Equipment, we are now a member of a retail company called The Outdoor Life Group. Private ownership provides us with the freedom to choose our own business path. We have therefore developed a retailing concept that excites us, and which we hope will inspire you.

Trek & Travel combines the best outdoor products from around the world with very experienced staff who all share a passion for travel and adventure. This passion for the wilderness, cultures and heritage of the planet keeps us actively seeking new places to explore.

We hope that you find us both welcoming and knowledgeable, and always willing to help you plan your next adventure."



"I spent close to 3 hours in this store today, being fitted for and choosing a pack, and the staff are fantastic. Helpful, knowledgeable, patient and friendly - and I think I'm probably a fussy customer and I have difficulty finding packs that fit comfortably. Has to be my best experience in this kind of store to date."
Amanda Warriner - 5★ 

"My favourite outdoor shop in Sydney. This is where you go if you want to see gear stocked because of it's quality, not just because it's corporate overload has pumped out another 10,000 puffer jackets that need to be moved before next season. Knowledgeable staff that actually partake in trekking and travelling themselves. Definitely worth dropping in!"
Tom Brickhill - 5★

"Always friendly, helpful staff with great knowledge. Great range of good quality products (nothing really low end) including Australian/NZ brands e.g. Wilderness Equipment, One Planet and Aarn. Never had a fuss with exchanging unused gear within the 2 week period."
Adam Jude Baus - 5★ 

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