On long trips it's handy to have a tank bag on your bike. The KTM tank bag is mounted to the bike via three straps. Therefore you don't have to put velcro pads or filler cap mounts onto the motorcycle. It has four pockets for your stuff: Two on the side, one main pocket and a pocket in the lid. By opening an internal zipper you can increase the size of the main pocket.
The bag itself is not waterproof. Because of that KTM provides a cover which has a transparent part on the top so you can still see your satnav or map. You won't be able to access your pockets anymore when the cover is on though.
A feature I like a lot is the ability to transform your tank bag into a backpack. By opening a zipper you can seperate the bag from its mount, get two belts out of a hidden pocket and attach them to the end of the bag so you get a backpack.
While having the tank bag mounted you can still do fueling: Disconnect the plastic clips of the two straps at the drivers seat and flip the tank bag over your handlebar. It will stay in that position and you can access the filler cap for fueling. After that's done flip it back, connect the plastic clips of the two belts, fasten them and you are good to go.
Mounting to the Duke 690
To mount the tank bag to your bike you first have to lay the bag on the tank. The strap loop has to point to the handlebar. This strap is put around the steering head between the two triple clamps. Make sure that you put the tank bag as close as possible to the ignition lock so you can sit close to the tank. After that the two straps with the plastic clips and loops at their ends are attached to the frame and then clipped to the tank bag. Finally all straps are fastened and that's it.
All in all I'm very pleased with this tank bag. It's easy to mount and dismount, you can flip it quickly to fuel up and it is mounted sturdily to the bike. It didn't loosen up while riding. The material and build quality are very good. Unfortunately the bag itself is not waterproof and with the cover attached you cannot access its pockets anymore. A nice feature is the ability to use it as a backpack for trips on foot.