LOST.TV - Mason Ho rides a 5'8" ...Lost Sub-Scorcher swallow-tail with Hydroflex Technology during two session at Newport and T-Street. Basically the board has no stringer and you can fill it with air with this bike pump. By changing the air pressure you can change the flex of the board. More air pressure = less flex. Less air pressure = more flex. Video by Joe Alani. For the full explanation go to www.hydroflex-surfboards.com