If you have coarse, curly, or kinky hair, you can tame frizz by sleeping on silk sheets and pillowcases. First, silk provides a friction-free, gentle environment that will keep your curls from tangling, breaking, and splitting. Nothing is gentler on your hair than silk. Second, silk naturally hydrates your hair. This is absolutely essential because the structure of a curly hair follicle makes it far more likely to grow dry and damaged. Silk sheets can help!