This is the Mares X-Stream Open Heel Scuba Diving Efficient Fins

Features:

• Tri Material construction provides superior performance, maximum elasticity, great durability and a resistance to aging
• OPB (Optimized Pivoting Blade) Fin Technology that ensures the blade is always at an optimal angle during both the up and down stroke
• Channel Thrust Technology system for optimal water channeling
• Maintaining optimal thrust throughout every phase of the fining stroke minimizes fatigue
• ABS (Adjustable Binding System) Plus Fin Buckles - one finger release
• Improved rubber, soft anatomical foot pocket, with ribbed insole for an improved fit and a dramatically more efficient fin stroke
• Riddled foot pockets prevent water from entering the space between the bootie and the foot pocket which would normally create a parachute type drag

The X-stream performance, comfort and lightweight design are the incredible result of sixty passionate years at the service of diving. The X-stream is truly a leap into the future, and changes forever how we envision the creation of a fi n. More than 2 years of resources, experiments and testing and four Mares patents all concentrated in one unique product.