Using this Topeak trunk bag is easy. First, you can choose to attach it to your bike rack with the provided straps. If you have a Topeak KLICKfix, Racktime, Snapit, or Vario Adapter, you can use the integrated plate for a quicker installation. When packing, put your larger items in the main compartment and smaller ones in the mesh side compartments. You can also place your water bottle in the rear holder. When you're off the bike, use the shoulder strap or the easy - carry handle to move it around. As for maintenance, keep it dry to maintain its weather - resistant properties. If it gets dirty, you can gently wipe it with a damp cloth. Avoid using harsh chemicals as they may damage the fabric.