DryFlx Headband. Ultralight and seamless DryFlx headband created for running and high intensity activities. Thanks to its 360º reflective design, this tech headband is perfect to enjoy night or early morning outdoor action in the city with improved security. Extremely breathable and stretchable, it provides quick drying and extra warmth. Ultralight and seamless headband created for running and high intensity activities. Thanks to its 360º reflective design it is perfect to enjoy night or early morning outdoor action in the city with improved security. Extremely breathable and stretchable, it provides quick drying and extra warmth.