Duotone Add-On Drift StopperTHE ESSENTIAL ADD ON FOR YOUR SUP TO AVOID DRIFTING OFF WIND. 99% of all SUPs and the majority of all modern Windsurfing boards do not feature a daggerboard or center fin. If you put the iRIG or any other Windsurfing sail onto these boards it is nearly impossible to come back where you started! Due to a missing stabiliser under your feet the wind and pressure in your sail basically push the board sideways off the wind. To solve this issue we are proud