Nylon rip-stop is a woven fabric made from nylon fibers that makes it resistant to tearing and ripping. Rip-stop refers to a material that can stop or prevent ripping and tearing. It's silky smooth and is a joy to wear around intimate areas. You can fold up underwear made from rip-stop into a small profile that is ideal for traveling. Rip-stop undies can also be washed and dried in a few minutes.