Futures XO Coco Mod Keel Twin Fin Set Futures collaborated with North Shore professional surfer Coco Ho on these modern keel fins for Coco ’s surfboard label XO COCO . XO COCO is a surfboard company designing equipment specifically for and with women. The Coco keel fins are designed with smaller surface area for women and smaller surfers. Built in solid fiberglass construction. Construction - Fiberglass Side Fins Area 20.06 Height 4.98 Base 5.57 Foil FLAT Angle 6.5