The Pony Run is a game changer for active women everywhere: no more stifled ponytails! With a generous comfortable flat-stitch opening in the back of this beanie, your hair can whip & neigh all day long. The Pony Run is made of our of our proprietary technical fabric, Comfort Shell™ which is renown for its antimicrobial and sweat-wicking properties. Comfort Shell™ helps to block the wind without stifling your skin. The Pony Run is great for jogging, running, and especially as a helmet liner for those with long manes.