Fourth Element OceanPositive Tech Fin: Eco-Conscious Power for Discerning Divers Embrace sustainable diving with the Fourth Element OceanPositive Tech Fin. These high-performance fins prioritize both powerful propulsion and environmental responsibility. Crafted from natural rubber with a unique density gradient, they deliver a comfortable fit, optimized stiffness, and reduced drag. Key Features: OceanPositive Construction: Utilizes natural rubber and recyclable materials, minimizing environmental impact. Single-Blade Design: Maximizes efficiency and power transfer for effortless kicking. Vented Blade with Stiffening Rails and Ribs: Reduces drag while ensuring powerful kicks and optimal maneuverability. Natural Rubber Foot Pocket: Provides a comfortable and secure fit with a slightly negative buoyancy for technical diving applications. Spring Straps with Easy Release: Offer a snug fit and facilitate easy donning and doffing, even while wearing thick gloves. Available in Multiple Sizes and Colors: Find the perfect fit for a personalized diving experience. Benefits for Divers: Eco-Friendly Performance: Reduce your environmental footprint without sacrificing power or efficiency. Effortless Propulsion: Experience comfortable kicking with minimal exertion. Maneuverability and Control: Navigate currents and explore reefs with confidence. Comfortable Fit: Enjoy a secure foot pocket that minimizes fatigue during extended dives. Technical Diving Ready: The slightly negative buoyancy aids with streamlining and trim. Ideal for: Scuba divers who prioritize eco-conscious gear choices. Recreational and technical divers seeking powerful and efficient fin propulsion. Divers who value comfort, maneuverability, and control underwater. Size Chart Medium: UK 4-7 / US 5-8 / EUR 36-41Large: UK 8-10 / US 9-11 / EUR 42-44X Large: UK 10-12 / US 11-13 / EUR 44-46XX Large: UK 12-14 / US 13-15 / EUR 46-48