UA Storm technology repels water without sacrificing breathability Ripstop stretch-woven fabric is light & super-durable UA Siro sweatband gives greater stretch & recovery, an ultra-soft feel & more breathable performance Adjustable hook & loop strap closure UA Free Fit: pre-curved visor & unstructured front conforms to your head for a sleek, low profile fit No top button so you can comfortably wear with headphones or headsets One size fits most