Using this belt is super easy. Just pass it through the belt loops of your pants and buckle it up to your desired tightness. When choosing a size, remember that Asian sizes are smaller than European and American ones, so pick a larger size if you're in between. Check the size chart before buying, and if you're confused, reach out to customer service. As for the color, it might look a bit different from the pictures because of screen variations. To keep your belt in great shape, avoid getting it wet too often and store it in a dry place. If it gets dirty, you can gently wipe it with a soft cloth.