Ripstops are woven fabrics often made of nylon using a special reinforcing technique that makes them resistant to tearing and ripping. During weaving thick reinforcement threads are interwoven at regular intervals in a crosshatch pattern. In this case it forms a regulated square pattern. Nylon ripstop may be waterproof water resistant fire resistant or have zero porosity (will not allow air or water through). Ripstop fabrics are often used in yacht sails and spinnakers hot air balloons kites parachutes remote control hovercrafts camping equipment such as lightweight tents and sleeping bags swags flags banners and other applications requiring a strong lightweight fabric. They can also be used for windbreakers and water-resistant jackets. Note: This nylon ripstop weights 1.9 oz. has a DWR finish (a water-repellent finish great for rainwear) and contains a Urethane coating.