Ripstop is a light, often waterproof fabric featuring a grid pattern of heavier yarns at regular intervals in both the warp and the weft. As the name implies, these yarns help keep the fabric from ripping. The heavier yarns are nylon, while the rest may be nylon or other fibers. Ripstop was developed during WWII as a substitute for silk in making parachutes.
Uses: Active sportswear, tents, sails