Ans. High-quality sun shade sails are made from high-strength woven PVC fabric that is treated to resist tearing. To put it simply, you can’t tear apart a good-quality shade sail just by trying to stretch it with your hands. So, when you are installing the sail, tighten it to the point you think it has reached the maximum, and then tighten it some more. After installation, the shade sail should look good enough to sit under.