Product Code: CX-AK-57-3G

3G AK57


The 3rd-generation version of the AK57 is identical to its predecessor in features and function. The two major differences are a new fabric, which now contains 40% Kevlar (up from 28% previously), and an all-welded construction, making it highly water-resistant. The only feature alteration is the ice-axe carrying system, which has been updated to stay abreast of modern tool development (so many ice-axes today have neither adzes nor hammers).

The AK57 is the big brother to the AK47 and features the removable floating lid of the AK47-X. Its name may not be as catchy, but that doesn’t mean it’s short of attitude – it’s just more understated. The larger capacity of the AK57 makes it a suitable pack for lightweight expeditions on high(er) altitude climbs, or for more traditional, less technical alpine routes.

This is the 2015 version where the main compartment is closed by a drawcord method. It has been superceded by a newer version which has a roll-top closure system under the hood. A small number are still available.




Removable floating lid – for more versatile load options
External lid pocket with welded seams
Side compression straps – quick and easy to fit or remove
Oversized back haul loop – easy to grab and clip
Top compression strap
40 mm webbing waist-belt with low-profile full-sized hip-fins
4 mm drawcords – for emergency rap anchors
Internal sleeve for hydration bladder
Two ice-axe holders
Stretch wand pockets

Technical Specifications

Capacity 57 + 5 litres
Weight 1250 g
Fabric 40% Kevlar / 60 % Cordura, 240 g/m²
Frame 7.00 mm Ø tubular titanium, full frame (removable)

1 (short)
2 (medium)
3 (long)

Spares & Repairs

If you break any buckles or your frame (it does happen), then don't panic. We have replacement parts for nearly everything. Please go to the Rucksack Spares area of our online shop.

Crux rucksacks don't often need mending, but they are not completely immune to abuse. Should your sack ever need repair, then please click here for details of our recommended repair agents.


Only size 3 in stock

Delivery & Returns

All our products are shipped with UPS for quick, reliable and secure delivery. As most of our products are quite large and/or of high value, they will require a signature. We cannot deliver to P.O. boxes. All orders are dispatched the next working day after receipt (Monday to Friday). Typical delivery time is 2–3 days.

If you change your mind about your purchase, you can return it unused for an exchange or refund, provided it is within 90 days of receipt of your order and the item is still in its original packaging.

Knowledge Base

For more information about our backpacks, please click on the following links below.
Sizing and fitting of crux backpacks
The physics of backpack design
Using the features of an AK pack