Using these penny loafers is a breeze. Just slip them on and you're good to go. They're perfect for both casual outings and semi - formal events. When it comes to sizing, remember they fit true to size, so pick your regular size. As for maintenance, use a soft leather cleaner to keep the genuine cowhide upper looking great. Don't expose them to extreme heat or moisture, as this can damage the leather. If the sheepskin lining gets dirty, use a gentle sheepskin cleaner. For the rubber outsole, a simple wipe with a damp cloth will do. Store them in a cool, dry place when not in use to maintain their shape and quality.