Using your Basil Evergreen double bike bag is easy. First, decide how you want to attach it to the carrier. You can use the pre - mounted straps for a fixed fit, or if you want it to be removable, you'll need to buy the Basil DBS system or an adapter plate like MIK separately and attach them. To adjust the bag's capacity, use the carabiner hook on the water - resistant folding clasp to expand it from 28 to 32 litres. Put your stuff in the main compartment and use the front pocket with the magnetic closure for easy - access items. If you're carrying heavy things, add the Basil Distance holder (sold separately) to prevent the bag from getting into the bike spokes. When it comes to maintenance, clean the bag with a mild soap and water solution. Avoid using harsh chemicals. Also, make sure to dry it thoroughly after it gets wet. Keep it in a dry place when not in use to prolong its lifespan.