Phase Five Board Sock Twin Fin The parallel rails increase down

The parallel rails increase down the line speed while the wide tail helps spin 360’s and creates tons of boost off the wave

1 is the largest skim style fin with the most grip throughout the entire skim fin lineup

Model Dimensions Volume Wt

designed by John Akerman is an exciting new shape for 2026

Phase Five Board Sock Twin Fin The parallel rails increase down100% cotton board sock created with the ultimate protection for your board. Designed with simplicity and easy to use. Features an inside pocket with a drawstring closure. Small fits up to all 51 Boards Medium fits up to all 58 Boards Large fits up to all 72 Boards