From Slip, this hair bow features: THE SLIPSILK DIFFERENCE: Traditional hair ties can tug on delicate hair which can lead to damage and breakage. Slip scrunchies are made with slipsilk, the same silk used in the award-winning slip pure silk pillowcase. Full ingredients: Made from 100% highest grade (6A) long fiber mulberry silk with a thickness of 22 momme (exclusive of elastic) Care instructions: Do not wash Do not bleach Do not tumble dry Do not iron Dry clean (Hydrocarbon solvents only. No perchloroethylene) Spot clean