The Chill-Its 6632 Cooling Skull Cap is a low-profile cap that wicks away moisture when worn dry and provides evaporative cooling relief when worn wet. Designed with stretchy performance knit fabric to provide UPF 50+ sun protection against harmful UV rays. An elastic band lines the interior for a snug and comfortable fit. HOW TO ACTIVATE Just soak in water until saturated, then wring out excess water – the evaporative cooling process begins instantly and lasts for hours. If