Using the Basil Bloom Field double bike bag is a breeze. First, decide how you want to attach it to your bike carrier. You can use the pre - mounted straps of the Universal Bridge system. If you want more options, you can buy the Basil DBS system or MIK adapter plates separately and use them for attachment. When you have heavy items in the bag, it's a good idea to get the Basil Distance Holder to avoid the bag getting caught in the spokes. As for carrying your stuff, just open the zipper and the Velcro closure, and put your groceries or other items inside. The bag's waterproof feature will keep your things dry in light rain. To maintain it, simply wipe it down with a damp cloth when it gets dirty. If it's really dirty, you can use a mild soap. Make sure to let it dry completely before using it again. Also, check the reflectors regularly to ensure they're in good condition for your safety in traffic.