The RK3 HD is the latest offering in the RK3 fin category. It is made from higher-density material compared to the standard RK3, making it stiffer and heavier, ideal for diving with a dry suit.

• Based on one of the first ventilated fins sold in North America and popular among military and professional divers
• Compact and highly durable for use in harsh conditions
• Improved foot pocket with springs for ease of use with cold hands or thick gloves
• The design has been the standard fin for the military, special forces, coast guard, and public safety for decades
• Short and wide blade that provides maximum forward thrust while maintaining great flexibility
• The ventilated design of the blade reduces resistance during uphill movement and enhances thrust during downhill movement
• The vents ensure that no vortices form along the backside of the blade, as happens with split fins
• The blade material is designed to withstand the toughest conditions, temperatures, and hardships
• Two large openings for easy storage of the fins with a carabiner
• Springs as standard
• Custom hook design that keeps the springs in the optimal position
• Available in 3 sizes: Medium (7-9), Large (9-11) & Super (12+)