Foil Drive Assist Slim(The Foil Drive Assist Slim is the smaller, lighter, performance orientated model, for the ultimate in performance hybrid electric assist foiling. Despite its small size, it offers the plenty of thrust to get you of foil easier and sooner however the smaller batteries do reduce the run time. The Assist Slim is perfect for advanced, high performance riders or wingers downwinders that do not require lots of battery capacity. The kit includes everything