* Futures-compatible fins * Fin template: F4 * Nylon composite construction * 3-fin set made for a Thruster setup * Colour: Bone The Northcore Futures Compatible F4 surfboard fins are made from nylon composite material and are based upon the F4 template, which is Futures' most popular fin. This template is balanced, can handle all conditions and is ideal for everyday riding. The medium-sized tip/base can help surfers generate speed and keep them on the rail. These fins are great for back-up and replacement fins. They also make a great choice for surf schools, and they're a budget-friendly option.