TrailHeads Hyper Reflect Women's Power Ponytail Headband (Cold Smoke Grey/Black) Polyester/spandex, 4-way stretch fabric is highly breathable and water resistant Contour fit provides full ear coverage to keep you warm 3M reflective "whirlwind" accent provides extra visibility Ponytail compatible opening (note: this headband also works well for non-ponytail wearers) Fits comfortably under a helmet