A fanatic wind foil is a type of windsurfing board designed specifically for wind foiling. Wind foiling, also known as hydrofoiling or simply foiling, is a relatively new discipline in windsurfing that involves using a hydrofoil (a large fin with wings) to lift the board out of the water and reduce drag, allowing riders to achieve higher speeds and smoother rides.

Fanatic is a brand that produces windsurfing boards, and they have developed a range of wind foil boards that are optimized for foiling. They have reinforced inserts for mounting the hydrofoil securely to the board.

Overall, a fanatic wind foil is a specialized windsurfing board designed to maximize the performance of wind foiling, allowing riders to experience the thrill of gliding above the water with ease.