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An independent twin-fin surf event and cultural moment, that brings people together and contributes to the local community.

The Twin Fin Invitational was created by professional free surfer William Aliotti to celebrate the timeless style and creativity of twin-fin surfing. It flips the traditional contest script: no panels, no pressure, just the world’s best free surfers sharing waves on classic twin fins.

Mixed heats, men and women together. Twin fins only, 19,5″ wide tail fish. The format puts the craft back at the centre of free surfing. Surfers and filmers pick the standouts on style, flow and creativity. No scores, just authenticity.

Vol. I 2024 opened in Seignosse with 34 invited free surfers; Victor Bernardo and Ainara Aymat walked away champions. A year later, Vol. II 2025 landed in Vieux Boucau for seven days of surf and culture, crowned by Maud Le Car and Kaito Ohashi.

The Twin Fin Invitational is bigger than what happens in the water. Every edition becomes a full week of film premieres, live music, art shows, shaping sessions and community dinners, surf culture at its most real. Giving back is also part of it, past editions brought people together for a beach cleanup and opened doors into the lifeguard profession.

For Vol. III, the event moves to Zarautz, one of the Basque Country’s most iconic surf towns.