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Koala 13 bikepacking seat bag

13 litre bikepacking seat bag with roll top closure, ideal for carrying your gear securely. Exo-Rail compatible

Koala 13 L Exo-Rail compatible saddle bag
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  • Black - Koala 13 L Exo-Rail compatible saddle bag
  • Chilli - Koala 13 L Exo-Rail compatible saddle bag
  • Lego - Koala 13 L Exo-Rail compatible saddle bag
  • Tarmac UL - Koala 13 L Exo-Rail compatible saddle bag
    Tarmac UL
  • Yellow - Koala 13 L Exo-Rail compatible saddle bag
  • Cordura Jaffa - Koala 13 L Exo-Rail compatible saddle bag
    Cordura Jaffa
  • Cordura Black - Koala 13 L Exo-Rail compatible saddle bag
    Cordura Black
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Please select a colour. If your desired colour is not available, you can request a Stock Alert and you will be emailed when the product is either back in-stock or on pre-order.

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Cordura Jaffa
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Cordura Black

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Whether you’re traversing rolling hills of the Peak District, exploring the Lake District mountains, or bouncing from bothy to bothy in the Scottish Highlands… the adventurous and ever-dependable Koala is a trustworthy companion. 

Koala attaches beneath your saddle to provide you with secure and light storage with an impressive capacity.

Koala is at its most stable when attached to the Exo-Rail, which reduces sway and increases stability. Attachment is quick, simple and secure with a slide-on, slide-off sleeve and stabilising saddle rail strap. If you don’t have an Exo-Rail, you can partner up the saddle rail strap with velcro straps and the handy webbing ladder to attach it without. If you're buying the Exo-Rail and Koala together, head over to our Exo-Rail / Koala 13 bundle for a bit of a saving!

Koala has a pared back design to make it incredibly spacious for its size and weight. Available in 13 L capacity, it’s spot on for packing your bulky, light, and compressible kit when off bikepacking (think sleeping bags and clothing). Koala also comes in 7 L capacity, which is also dropper seat post compatible.  

Roll-top closure and compression straps keep your cargo compact and portable and ensure stability when the bag is less full. 

When cycling in a downpour, we recommend using a drybag with your Koala for added protection.  

"Is it waterproof?" 

Although highly weather resistant, this product is not fully waterproof due to its stitched construction. If you are carrying valuables or electronic equipment, make sure to put it in a dry bag.  

Key features
  • 25 Year Alpine Bond
  • Spacious and secure under-seat storage for bikepacking, exo-rail compatible
  • Made to last in the UK
  • Fully customisable (contact support@alpkit.com)
  • Made with waterproof and highly abrasion-resistant fabrics
  • Roll-top closure and compression straps for stability
  • Bar-tacked saddle rail strap, angled for support
  • Daisy chain webbing for versatile attachment
  • Tapered cut doesn’t interfere with your pedalling
  • Compatible with Airlok Tapered
  • Attaches beneath the saddle
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Vital stats
VX21 (Chilli, Lego, and Black)

A 4-layer, 210 denier laminated nylon fabric with a DWR finish: VX21 (or X-Pac to its friends) is a high tech, ultralight sandwich of materials that is highly abrasion and tear resistant, low-stretch, and waterproof.
Weight: 255 g

LS07 (Tarmac Ultra Light)

The lightest waterproof and abrasion resistant fabric we use, ideal for your ultralight long-distance racing or bikepacking set-up. A 70 denier Nylon Ripstop backer makes it super tough for its weight.
We make LS07 products without a lining to keep them ultralight. 
Weight: 215 g

500D Cordura

500D Cordura is heavy duty, waterproof and highly abrasion resistant, so we often use it to make hardcore bags without adding extra weight. The clear PU coating repel dirt and water too, giving your stuff a bit of protection and making it easier to wipe down.
Weight: 260 g


Capacity: 13 L
Dimensions: 41 x 21 x 17 cm


Buckles: 20 mm SJ with Camlok, 25 mm Xlite with Camlok
Stitched Seams
Roll-top closure

Fitting Guidelines

Koala attaches to the Exo-Rail with a slide-on, slide-off sleeve and saddle rail strap. You can attach Koala directly to you saddle without the Exo-Rail using the handy webbing ladder and velcro strap, but it will not be dropper seat post compatible without the Exo-Rail. 
Minimum clearance from saddle rail to wheel: 18 cm

Origin: United Kingdom

Product Care Information

​Koala has a C6 DWR coating which helps it to repel water and dirt. After your two-wheeled epic, wipe down your Koala with a damp cloth to remove dirt.

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What You Say: Customer Reviews and Comments

1 Reviews


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Marc Clish
Great Product, not so great customer service.

After receiving my Koala 13 seat bag and matching Fuel Pod 22 in Matching Cordura Jaffa I was pleasantly surprised at how good the build quality is on both items... My only disappointment is that they don't do any of the handlebar bags to match, and trying to find out this from customers service team has proved unsuccessful, with no reply to my enquiry through the online form... It does state that they reply to every email?