F4 foils has the stiffest mast on the market! We are so proud to get these kind of results in the test, this is what we been working hard to achieve. It´s a great win to F4 foils in delivering the best foils out there, and a game changer in hydro foiling in high speeds! Check out the test below, and don´t miss out on the video of our founder Chris explaining the benefits of the mast and it´s stiffness.