When you receive your mainsail from Precision Sails we supply you with a Velcro strap which is intended to be put on the clew around the boom. This Velcro strap has a couple of functions. The first is for when you’re sailing in heavy winds or stormy weather you can wrap it through your clew and around your boom for extra stability and strength. Another is when you are not using a clew slug, you can simply use the Velcro strap and make quick adjustments to the tension of the sail. In this video Darryl, owner of Precision Sails, reviews the various uses for your Velcro strap on the clew.