What Is Wrong With My Windsurfing Sail?
Windsurfing consists of two main components – a Board and a sail.
The sail has several components – the actual sail (canvas), boom, mast and extension.
The Board also consists of several parts-from the mandatory it is: the Board (body), fin, hinge; from the optional it is: the shvert and loops for the legs. You need to check the canvas of the sail to check for problems. Of necessity, replace it, good suggestions are on this page: https://easy-surfshop.com/do/cat/windsurfing-sails
I hope I helped you