Our site works best with JavaScript enabled.
{/layout:set} {/layout:set}

Koala bikepacking seat bag

Koala 13 - Chilli


  • 13l Chilli - Koala 13 - Chilli
    13l Chilli
  • 13l Black - Koala 13 - Black
    13l Black
  • 13l Lego - Koala 13 L - Lego
    13l Lego
  • 7l Chilli - Koala 7 - Chilli
    7l Chilli
  • 7l Black - Koala 7 L - Black
    7l Black
  • 7l Lego - Koala 7 L - Lego
    7l Lego

Bikepacking seat bag with roll top closure, stable for carrying your gear securely. Exo-Rail compatible. Available in 7 litre and 13 litre sizes

SALE: £74.99 Was: £84.99

1. Colour / Size
Fitting guide
7 13
7 13
7 13
Cordura Black
7 13

Please choose an option above

  • Full Description
  • Features At A Glance
  • Care & Environmental Advice
  • Customer Reviews

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.

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.  

Product Insight
More images

Key features
  • 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
  • 25 Year Alpine Bond
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:7 L: 190 g; 13 L: 255 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:7 L: 180 g; 13 L: 260 g


Capacity: 7 L / 13 L
Dimensions: 7 L: 37 x 17 x 13 cm; 13 L: 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 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.

What You Say: Customer Reviews and Comments

6 Reviews


Used this product?

Write a review
Old bloke cycling
A great seat pack

I have the 13 litre version with an Exorail. When I go it I thought - they’ve sent the wrong one; this is tiny. But it’s Tardis-like. I’ve got a bulky sleeping bag and it fitted with ease. The Exorail is a great idea - I have another brand’s seatbag and the Koala sways much less with the Exorail - it’s almost completely rigid. Very impressed.

Best solution yet

So far so good, keeps the water out and stops the sway. I can fit my 2 man tent in it no problem (13L) I was finding it a bit annoying to remove it when not in use so i made a short exo rail that won't come out past the end of the seat. So now its quick to whip off the exo rail.

Also watch out for clearance when using the dropper. I've heard of a friend that when on a section of single track and the bag got caught in the tyre and ripped under the wheel bending the exo rail!

Very robust saddle bag

Easy to attach! Sway is very minimal, I barely notice it is there, even when it is fully loaded.

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?

Get rid of those panniers

If you accept the limitations of bikepacking bags like this then you will be really happy. I found that every hours the straps would loosen and I would have to re-tighten them. I was not using an exo-rail but found this perfectly acceptable. There is a lot of away when climbing out of the saddle, therefore I would recommend the exo-rail if you can fit it. Between the koala 13 litre, a small frame bag and 3 litre handlebar bag I can pack enough kit for a 2 or 3 day self supported trip. Recently just cycled from pencoed in Wales to Worthing over two days and this was a brilliant solution.

Caution with full suspension

Perhaps this bag works well on a hardtail bike. However, I caution using it on a full suspension bike. I exceeded the necessary clearance measurement listed in the description, however any bumps I rode over caused the bag to snack against my rear tire. This jarring, and potentially dangerous. This happened with the additional support of an ExoRail. There are other bags out there I am going to try, and I hope to sell this one on to someone who can use it effectively.

Here are some similar products

Camo Stem Cell

Limited Edition stem-mounted accessory bag


Camo Possum

Limited Edition X-33 camo print ½ frame bag



mountain bike ½ frame bag for bike packing



Welded waterproof frame bag


Camo Betonga

3 L bag for attaching to fork cages


Camo Fuel Pod

Limited Edition top tube bag for snacks and tools


Be the first to hear about our newest products and promotions

Join AlpCol's Espresso newsletter for that hit of Go Nice Places, Do Good Things Greatness


By adding your email you consent to our terms and conditions