Using these belts is easy. Just thread the belt through your belt loops and buckle it up. You can adjust the fit according to your waist size. As for the warning about chemicals, try to avoid direct and long - term skin contact. When it comes to maintenance, use a soft, dry cloth to wipe off any dust or dirt. Don't use harsh chemicals or abrasive materials to clean the belts as it may damage the faux leather. Keep them in a dry and cool place when not in use to maintain their quality.