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Sierra Designs

Flex 7-10 L Waist Pack


A well designed, comfortable waist pack, with integrated water bottle pockets and enough room to stash an extra layer or waterproof and some food. Padded hip belt for on trail comfort. Great For Walkers, Cyclists, Mountain Bikers and Bike-Packers.


The Flex Lumbar collection takes the same expanding gusset found in the Sierra Designs Flex Capacitor range, and shifts it vertically to work as a lumbar pack. Integrated water bottle pockets and enough room to stash a layer and some food means you have your bases covered for any day hike or mountain biking. Flex it open when you need to carry more, or cinch it down when you want a lower profile pack.


  • Stretch mesh water bottle pockets

  • Zippered valuables pocket

  • 1 main compartment, 1 hidden top zipper

  • Vertically expandable volume

  • Dual compression straps to stabilize load

  • Padded hip belt for on-trail comfort


  • 100D Nylon-Poly Ripstop

Great for Mountain Biking or Bike-Packing. See review from Single Tracks here

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We Manufacture and Supply Ultralight Outdoor Gear. We Manufacture in the UK, Backpacking Quilts, Ultralight Bivys, Groundsheets and a wide range of UL Specialist Accessories.

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