SUNOVA DOWNWIND FOIL SUPThe Downwind FOILBOARD is and obvious step in the right direction, designed by Marcus Tardrew, so it definitely has a race influence.. Fly downwind like never before.. WHATS THE DOWNWIND FOIL ABOUT It's for when you want to go downwind faster than ever before.. If you look at the Americas Cup racing yachts you'll see how much quicker they are with the foils, it was only a matter of time before this technology made it's was over to downwind boards..