TUSA SF-15 X-Pert Zoom Z3 Open Heel Scuba Diving Fins

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The highly regarded and best-selling SF-8 X-Pert Zoom split fin was brought to market in 2003 after over 5 years of research and development. In 2009, TUSA once again redefined the fin market with the introduction of the SF-15 X-Pert Zoom Z3. The SF-15 further improves upon the performance, features, and design of the SF-8 by incorporating 3 materials, a 10% longer blade length, enhanced propeller-fin technology, reinforced blade rails, and optimized blade scoops.

These new features, combined with TUSA's patented 27-degree Angled Blade Design and EZ strap buckle system, make the SF-15 the ultimate fin for divers. The Angled Blade Design (A.B.D.) addresses a key issue with traditional blade fins – when the leg is fully extended, there remains a 27-degree angle between the heel, foot, and calf, resulting in a 10% loss of propulsion. This is because the fin is angled below the body, causing the diver to be pushed forward and down instead of straight ahead during the kick phase.

The SF-15 fin, however, incorporates the 27-degree angle into its design, ensuring that 100% of the energy expended during the kick phase is directed toward the diver's propulsion. To achieve this, TUSA developed a specialized robot that can replicate the kick-cycle and movement of a human leg. This robot can mimic the motion of a human exactly and relay accurate data, allowing TUSA to analyze the performance of the fins under various conditions, such as different kick variations and water resistance.

The robot's findings have shown that to maximize the performance of the SF-15 fin, divers should use a small bent-knee kick with a light rhythm. This creates less strain on the leg muscles compared to traditional fins, reducing the diver's fatigue and enhancing their overall diving experience.

The SF-15 X-Pert Zoom Z3 fin's key features include: - Three-material design for increased performance compared to standard split fins - Patented 27-degree Angled Blade Design - Enhanced propeller-fin technology that optimizes efficiency - Multi-compound foot pocket that increases power transfer to the fin blade - Reinforced side-rails that decrease blade separation, increasing stability and kick-style versatility

In conclusion, the SF-15 X-Pert Zoom Z3 fin is the result of TUSA's extensive research and development, and it sets a new standard in the world of diving fins. Its innovative design and cutting-edge technology make it the ultimate choice for discerning divers.

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