Thank you for viewing. This is Asahi Shoes' Kaiho Shugi. Although it has a zipper, it can also be worn as is due to the rubber specifications on both sides. [Product Features] 1. Controls weight transfer to support walking 2. Light enough to float in water 3. Safe and easy to avoid tripping 4. Easy to take on and off 5. Safe and secure domestic production ▲ Returns and exchanges are not accepted. We will respond to your questions until you are satisfied. ☆ We will ship via Letter Pack Plus. Receipt is required. What is "Letter Pack Plus"? This is a shipping method that allows tracking with a tracking number. It is treated as express delivery, so it arrives faster than home delivery. It is delivered in person. We look forward to your purchase.