Koala 13L is a lightweight saddle pack for carrying bulky items on multi-day bikepacking trips. A roll-top closure and compression straps keep kit packed tightly reducing movement over rough terrain, with adjustable seat post and saddle rail attachments for a secure fit. Koala is compatible with the < ahref="/products/exo-rail-seat-pack-mounting-system">Exo-Rail saddle pack mount for extra stability and reduced sway. Reinforced construction using hardwearing waterproof fabric protects your kit from all but the heaviest rain. The Airlok Tapered dry bag also fits neatly inside for a fully waterproof setup. Built to last by hand in the UK with a 25-year Alpine Bond.


Weatherproof construction

Waterproof X-Pac® X11 and Cordura® fabrics for all-weather riding

Exo-Rail compatible

For maximum stability and reduced sway over rough terrain

Roll-top closure and compression straps

Helps minimise excess internal space to keep kit tightly packed and reduce movement

Built to last in the UK

Reinforced construction with abrasion and tear resistant fabrics, backed up by our 25 year Alpine Bond

Product overview

  • Rack-free carrying solution for bulky items
  • Waterproof X11 and Cordura® fabrics (not seam-taped)
  • Roll-top closure and compression straps allows partial fill without excess internal space
  • Secure webbing attachments to saddle rail and seat post
  • Compatible with the Exo-Rail for reduced sway and extra stability for heavier loads
  • Fits the Airlok Tapered inside for fully-waterproof setup
  • Handmade in our UK Factory
  • 25-year Alpine Bond

Technical details


X-Pac® X11 3-layer laminate (100% organic cotton duck / recycled polyester X-PLY / polyester film backer), 1100D Cordura® nylon, nylon webbing and strapping


Height: 41cm Width: 21cm Depth: 17cm




United Kingdom

Sustainability & Care

Environmental impact

Organic cotton

X-Pac® X11 fabric uses a hard-wearing 100% organic cotton face fabric. Organic cotton farming produces significantly less CO₂, uses less water and eliminates the use of harmful pesticides.

Climate neutral fabric

X-Pac® X11 fabric is certified by cleenTEC® as being 100% climate neutral. X11 is made from a mixture of plant-based and recycled materials and manufactured in factories using only green energy.

Care Advice

Koala has a DWR coating which helps it to repel water and dirt. After your ride, wipe down your bag with a damp cloth to remove dirt or use mild soap on more stubborn muck. Leave to air dry.

Size Guide

Koala Seat Pack Size Guide

Size Capacity Dimensions
7 7 litres 37 x 17 x 13cm
13 13 litres 41 x 21 x 17cm
Bike Perfect - Alpkit bikepacking bags review: Fuel Pod, Bilbie and Koala put to the test

We’d like bolt-on mounts for the Pod or Cradle and a web mesh on the Koala whose straps also need tucking in neatly. Otherwise, Alpkit has delivered an excellent set of fast but accurate to fit bikepacking bags using an even tougher selection of premium materials to make them more durable than the predecessors we’ve had no issues with over years of use. Details like the replaceable straps boost longevity too.

Pricing is excellent, considering the bags are all handmade in the UK and come with a 25-year ‘Alpine Bond’ guarantee against defects and reduced-price repair if you accidentally trash them.

Rating: 4.5 stars (out of 5)

Read the full review