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..Made with slipsilk™ to be gentle on your delicate hair | 100% silk (exclusive of elastic)..Slipsilk™ has been scientifically tested by an independent third-party lab and shown to significantly reduce friction and absorb significantly less face cream.