Thou Shalt Sleep on a Sateen Pillowcase
"Cotton absorbs moisture — no matter how expensive or how high the thread count is," Townsend explained. "So it's going to steal the moisture from your skin and your hair while you sleep."
He recommends choosing a sateen (cotton coated in polyester) because it's cooler, so you won't sweat as much or tangle and roughen up the hair. Plus, he promises it makes a blowout last much longer.