Most people buying commercial shade sails don't realise the difference between a quality sail and a cheap one until it's too late — usually after the first storm tears it apart. The biggest culprit? Webbing straps and rope edges instead of proper stainless steel cable. Without 316 SS cable tensioned through the hem, a shade sail simply cannot be pulled drum-tight, and a loose sail ... https://diyshadesails.net.au/what-are-custom-diy-shade-sails/