Using these fenders is super easy. First, open the package and take out the fenders. Then, punch out the shape and fold it along the perforated lines. Next, use the hook - and - loop straps to attach the fenders to your bike in one of the multi - mount positions. When it comes to safety, the reflective printing on the fenders will help you be seen at night. As for maintenance, just clean them with a damp cloth regularly. Make sure to check the straps for any signs of wear and tear. If you notice any issues, you might need to replace them. And that's all you need to know to get the most out of your Topeak fenders.