Select S1 Pro XL Deep Tuttle 49 The S1 Pro is what you need for speed. A full-carbon race fin that is even PWA approved. Designed for the sailor looking to be the fastest on the water. The S1 Pro XL is a full-carbon race/slalom fin designed for high performance and speed. It features a stiffer fins body and an even more blocked twist to provide with a strong foil effect. Key Features: Technology: Hand-finished, custom moulded pre-preg carbon Rigid fin base for stable power transmission Carbon patch for more stability at high speed Straight leading edge for smooth power control Very sharp trailing edge for less drag and enhanced performance Blocked twist for increasing the lift Soft tip for comfortable riding that generates a good amount of lift. New version of the S1 XL Slam EVO Full carbon fin Strong foil effect thanks to a stiffer fins body and an even more blocked twist Reduced drag for higher performance levels Higher end speed PWA Approved Box: Deep Tuttle Available Sizes (cm):41 / 43 / 45 / 47 / 49 / 51