Moon Boot Icon boots are perfect for cold weather activities like winter sports, snowshoeing, or simply strolling in the snow. They provide warmth and a unique retro-futuristic style, making Moon Boots a lasting fashion statement. Unlike traditional Moon Boots that often have a vinyl or faux leather upper, the Moon Boot Icon Nylon features a nylon upper. Nylon is a lightweight and durable material commonly used in winter and outdoor shoes.