Some joints are immovable, e.g., those that connect the bones of the skull, which are separated merely by short, tough fibers of cartilage. (ericbakker.com)
The Flyknit shoes use tough fibers to create lightweight uppers with targeted areas of support, stretch, and breathability. (businessinsider.com)
Marinades not only add flavor to meat or tofu dishes but also break down the meats tough fibers. (kombuchakamp.com)