Using these fenders is super easy. First, take them out of the package. Then, punch out the fender shape and fold it along the perforated lines. After that, use the hook - and - loop straps to attach the fenders to your bike in one of the multi - mount positions. Make sure they're securely attached. When it comes to maintenance, simply clean them with mild soap and water after each use. Keep them dry and stored in a cool place. Don't use harsh chemicals or abrasive materials on them, as this could damage the reflective printing or the polypropylene material. And that's all you need to know to keep your fenders in great shape and ready for wet weather.