Using your Basil Noir Business Bag is a breeze. For bike use, simply attach it to your bike via the Hook - On system. When you want to carry it by hand or on your shoulder, adjust or remove the shoulder strap as you like. To keep your bag in top shape, clean it regularly with a damp cloth. Avoid using harsh chemicals as they may damage the waterproof fabric or the faux leather details. Store it in a dry place when not in use. Also, don't overload the bag beyond its 17 - litre capacity to maintain its structure. If the reflective details start to fade, it might be time to replace the bag for safety reasons.