Apollo Biofin Pro Size: M 5mm Boots: 24-27cm 3mm Boots: 26-28cm Color: Black The fin straps have heel protectors, allowing for easy attachment by simply pulling. Even when wearing marine shoes at 26.5cm, there is no slippage, and the usability is very good. It's easy to use and provides good propulsion, allowing you to move with minimal effort. Of course, it's made in Japan. Used in the ocean. There are scratches, but it's still usable. I will offer a small discount if you purchase it with other items. Thank you. #apollo #fins #diving #apollosports