Orange GULL Super Mew Double X fins, L size, with spring fin straps, customized for high visibility underwater! The included original straps have been customized with spring fin straps, which cost around 8,000 yen, making this a great deal! Unlike the original straps, these fit snugly around the heel and Achilles tendon with every movement, preventing loosening or coming off while swimming. This allows you to transfer the power of your legs directly to the fins, reducing fatigue and providing excellent propulsion, making them highly recommended for everyone from beginners to advanced divers! The spring straps also make them easy to put on and take off. You can put them on and take them off underwater, just like putting on shoes, making entry and exit very easy! Of course, the original straps are also included, so you can try both and see which you prefer! These fins are designed for use with marine boots and drysuits, making them versatile for all seasons! Shipping will be via the safe and secure Rakuraku Mercari service! Please understand that the packaging will be a simple method, with the fins placed in a bag and wrapped in bubble wrap. ^^;