Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
10% off
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
Sierra DesignsSierra Designs Flex Trail 40-60 Backpacking Pack
(2 Reviews)3.50 / 5.00

Sierra Designs Flex Trail 40-60 Backpacking Pack

£171.00 £190.00
By Sierra Designs
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Free Delivery in the UK: Available on all orders over £50.

Next-Day Delivery: Available for orders placed before 3 PM with DPD (additional charges apply).

Secure Checkout: Includes theft protection for added peace of mind.

Refunds & Exchanges: Contact us within 30 days for hassle-free returns or exchanges.

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 customise 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
    Customisable 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

  • Specifications

    MATERIALS
    150D Polyester Ripstop / 420D Polyester

    TECH SPECS
    Capacity: 39-56L
    Weight: 1.23 kg
    Optimal Carry Weight: 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

  • Weight

    1230 g

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Verified Customer
Craig R
Edinburgh, GB
Sierra Designs Flex Trail 40-60 Backpacking Pack
Great pack. Used it on the WHW in varied weather. Took a while to dial in the fit, but that's probably me and was comfortable once i got it. Great weight to comfort balance. Not as many pockets/compartments as other packs but that's probably where the weight is saved. I found the adjustment a bit fiddly and the the lower clips seem to want to slip out when taking the pack on and off so you just need to be aware of that.
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1 month ago
Verified Customer
Ian B
Aylesbury, United Kingdom
Sierra Designs Flex Trail 40-60 Backpacking Pack
the flex trail seems to need further upgrading, wasted space on the sides because there is no side straps for holding walking sticks etc.
1 person found this review helpful.
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2 years ago

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Valley and Peak Promise

"The Valley and Peak promise is built on three pillars: thoughtfully curated gear, exceptional customer service, and a genuine love for the outdoors. As an independent, family-run business, we carefully select products from a wide variety of cottage gear brands and trusted names, ensuring that each item is rigorously tested and loved by our team. Our customer service is a cornerstone of our brand, offering personalised support to help you choose and care for your gear with confidence"

Jim De'Ath, Managing Director