These black 7388 PU belts are super easy to use. Just insert the buckle through the belt loops of your pants and adjust it to your desired tightness. When it comes to maintenance, use a soft, damp cloth to wipe off any dirt or stains. Avoid exposing the belts to excessive heat or sharp objects as this can damage the polyurethane material. Also, keep in mind the California Proposition 65 warning. If you have any concerns about the chemicals in the product, refer to the information on www.P65Warnings.ca.gov.