I have another thread on here about the backrest bag. Its too long for our bikes so I had to cut about 4 inches out of the hard liner. Preparing for this trip I realized it is better than I thought. My bike didnt come with the tool box cover so I can put anything in there. With the space in the actual bag I put my tools in the back(socket set, mini meter, wire cutters, 4 screw drivers, and some jumper wires) in the front I didnt put anything but next time ill put an extra shirt. On top of that I had 4 bottles of water inside the hard liner and I could have added 2 more or an ice pack.