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Crux AX45 Smoke

A very well designed lightweight but tough 45 litre winter climbing/alpine sack available in a two back lengths - Regular and Long. Weight:  ca 1150g.


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  • Regular
  • £95.00
  • 1 in stock
  • Check Store Availability
  • Long
  • £95.00
  • 1 in stock
  • Check Store Availability
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Crux AX45 Smoke Video


With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

You Pre-Order is prioritised (at no additional charge); meaning that, as soon as the product arrives with us, we can wrap it straight back up and get it sent out to you - it often never even hits the stock room shelves!


With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery Dates

Estimated Delivery Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery Dates provided on product pages.

The Current Estimated Delivery Dates for Crux AX45 Smoke is

Crux AX45 Smoke Description

  • Brand : Crux
  • Season : Not Applicable
  • Code : CRX AX45SM
  • Packaged Weight : 1.9KG
  • The AX45 is based on the previous (no roll-top) Crux AK47 but made of Cordura/Dyneema rather than Kevlar fabric. A very well designed lightweight but tough 45 litre winter climbing/alpine sack.

    Instead of the AK's famous Kevlar fabric, the AX45 has a lighter Cordura fabric with a 3 mm Dyneema ripstop developed exclusively to Crux's specification. Other changes include changing the frame to twin tubular stays and using narrower webbing (webbing adds a surprising amount of weight to a rucksack). Although the carrying harness is identical to that of the AK sacks, the AX45 has a new feature – the hip belt can be fully removed, leaving just the webbing to fasten around your waist.
    The AX45 comes in a two back lengths – Regular (for those up to around 5’11” or 180cm) and Long.
    • External lid pocket.
    • Security pocket on inside of lid.
    • Does NOT have an extending lid.
    • Side compression straps – quick and easy to fit or remove.
    • Oversized back haul loop – easy to grab and clip.
    • Top compression strap.
    • Dual drawcord closure system on extension sleeve.
    • 3 mm Tendon drawcord – Crux suggest that it can be used as an emergency abseil sling (but beware it is only 1.4kN and could cut easily on a shap edge).
    • 40mm webbing waist belt with removable hip belt.
    • Internal sleeve for hydration bladder.
    • Two ice-axe holders for modern axes.
    • Wand pockets.
    • Reinforced, double-layer base panel.
    Fabric: 15% Dyneema / 85 % Cordura, 150 g/m².
    Frame: Two 7mm tubular titanium stays (removable).
    Capacity 45 litres.
    Weight:  ca 1150g.

    Buyers Guide

    Sizing Information

    Crux Back Sizes and Fitting

    Rucksacks are either size 1, 2 and 3, or Regular (R) and Long (L).

    Where rucksacks only come in one size, this is equivalent to a Regular.

    Size Backlength Typical Height Range
    1* 45cm 160cm - 170cm
    R 48cm 155cm - 175cm
    2 50cm 170cm - 180cm
    L 55cm 175cm - 185cm
    3 60cm 180cm - 190cm

    * Size 1 is optimised for women, but fits small men also.

    Please note: The height range given for each back length is only a guideline and may not be right for your particular proportions. Crux always recommend trying on their rucksacks before you make your final choice.

    Typically, the hip-belt should wrap around the top of the pelvis, so that the hips are able to share the overall load (see diagram). But you may wear your rucksack differently, and this will also affect your choice of size. For example, some climbers carry their rucksack “high” – in other words, around their waist and thus above the pelvis – and may prefer a rucksack with a shorter back length.

    Technical Information

    Crux AX45 Smoke
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