Flex Trail 40L-60L Backpack

Sierra Designs
Free Delivery
Sold and shipped by Twist Distribution Ltd
Option: Peat
Choose a Size
View Size Guide
Big adventures made lighter. Explore like a pro no matter your experience level. The Flex Trail ultralight backpack gives you the ability to tailor the pack size to your adventure needs by taking advantage of the horizontal gussets. Cinch it down to a 40L cargo pack capacity for your shorter trips. Expand it out to 60L for your longer backpacking adventures. Continue to customize your backpack with the hardware-based adjustable torso. Keep your essentials close at hand with oversized mesh pockets and zippered hip pockets. The aluminium perimeter frame suspension keeps this backpacking pack lightweight while the support stays strong. FEATURES • Expandable volume to adjust to both short and longer backpacking adventures • Lightweight aluminium perimeter frame for increased stability • Customizable fit with a hardware based adjustable torso • Large front stretch mesh Shove-It pocket to easily store jackets and other day essentials • Zippered hip belt pockets and 2 stretch mesh side pockets for storing water bottles and items you need to keep on hand • U-shaped access to top zipper and zip stash pocket in lid to store items for easy access • Ultralight backpacking backpack MATERIALS • 150D Polyester Ripstop / 420D Polyester TECH SPEC • Capacity: 39-56L / 2380-3417 in3 • Weight: 2 lbs 12 oz / 1.23 kg • Optimal Carry Weight: 15-45 lbs / 7-20 kg • Torso Fit: 15.5" - 21" / 39 - 53 cm • Waist Belt Size: 31" - 54" / 31 - 54 cm • Dimensions (H x W x D): 27.5" x 10.5" x 14" / 70 x 27 x 35 cm • No. of Hip Belt Pockets: 2 • No. of Exterior Pockets: 5 • SKU: 80710623WD

Fabric Composition

100d nylon-poly ripstop 80%, 420d nylon oxford 20%

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UK Deliveries

  • UK Mainland

    • FREE Standard Delivery within 3-5 working days on orders over £75

    • £5.95 Standard Delivery on orders under £75

    • FREE Express Delivery within 1-2 working days on orders over £150 - order before 1pm

    • £5.95 Express Delivery on orders under £150

  • Scottish Highlands, Isle of Man, Isle of Wight & Isles of Scilly

    • FREE Standard Delivery within 3-5 working days on orders over £75

    • £5.95 Standard Delivery on orders under £75

  • Northern Ireland

    • FREE Standard Delivery within 3-5 working days on orders over £75

    • £9 Standard Delivery on orders under £75

  • Orders are sent via FedEx or PDP

UK Return & Refund Policy

  • Orders can be returned within 60 days of receipt

  • The products must be in their original packaging, with all tags and in original condition

  • Returns are free

  • For faulty or damaged items, please contact Mountain warehouse Customer Service team

Return method:

  • To return your order, create your freepost return label at https://returns.sorted.com/exxel/

  • Please safely pack your items in secure, protective packaging to ensure they arrive undamaged.

  • Take your package to your nearest drop off point. To find your nearest drop-off point, visit https://www.yodel.co.uk/store-locator.

  • Please retain proof of postage until it has been confirmed that your refund has been processed.

  • Please note that items sold by Twist Distribution Ltd cannot be returned to Mountain Warehouse stores.

Return address:

For more information or help, please contact Mountain Warehouse's Customer Care.

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