These cross - body bags are super easy to use. Simply adjust the strap to your desired length and wear it across your body or around your waist. They're great for carrying small essentials like your phone, wallet, and keys. When it comes to maintenance, use a soft, dry cloth to wipe the surface regularly to keep it clean. Avoid exposing them to harsh chemicals or rough surfaces. Also, keep in mind the warning about the chemicals, so don't let it come into direct contact with your skin for long periods. Store them in a cool, dry place when not in use to maintain their shape and quality.