evo.com | Lib Tech Fins > The Lib Tech Quad Large Fin Set is designed for shooting down the line in all conditions with dependable hold. They can also be used as a tri-fin set if you're feeling zany! 4 Fins Upcycled Construction Since almost every surfboard in the world is basically an oval shape cut out of rectangular material, Lib Tech is saving the unused corners of their surfboards and making fins out of them. Tensioned Carbon Fiber Torsion Rods Lightweight Hexzylon Fiberfoam Core Reinforced Carbon Fiber Biaxial Base | Lib Tech Quad Large Fin Set 2027 - Large