Slingshot SUP WinderThe SUP Winder It installs in minutes transforming your standard SUP board into an efficient wingsurfing board. With the SUP WINDer installed, a wing in your hands, and a little technique, you can stay upwind and return home to the same place you launched from. Great for teaching first time wingsurfers and exploring your local waterways. Using wind power you will propel yourself across the water at far higher speeds, while expending less energy than