"Great shape makes full use of the small volume."
The 4cm narrow body reduces the chances of your thigh rubbing against the side of the bag during rides.
The Roadster series utilise two Velcro straps to secure the bag onto the saddle rail and seat post respectively.
Contents are kept dry in muddy or wet surroundings thanks to the waterproof fabric underneath, which also makes the bag easier to clean.
Read more about the trusted Roadster II saddle bag on road.cc.