Material - our women's Merino ponytail hat is 90% Merino wool, 8% nylon and 2% spandex. The fleece lining is 96% polyester and 4% spandex Imported Pull-On closure Easy Care - machine wash cold on a delicate cycle - air to dry Ponytail Hat - our running hat for women has a high ponytail opening. The slot style 3’ opening fits most ponytails and closes fully when not in use. Made with Merino - soft, sustainable merino wool is a powerful fabric. It’s odor resistant, quick drying and moisture wicking, providing everything you need for comfort on the run. Lightweight Protection - the merino wool of our ponytail hat locks in warmth without weighing you down.