The Ergodyne Chill-Its 6634 cooling headband is a low-profile wrap that wicks away sweat and moisture when worn dry and provides evaporative cooling relief when worn wet. Stretchy performance knit fabric and contoured design make for a snug, comfortable fit on most head sizes. This skull wrap is rated UPF 50+ for protection against harmful UV rays and features an anti-odor treatment for fresh all-day wear. The bandana fits comfortably under a hard hat or helmet and is a great option for those with longer hair/ponytails. Perfect for construction, landscaping, roofing, or anyone working in the heat. The headband can also be used to reduce the risk of heat stress for outdoor recreational activities. Made of stretchy performance knit fabric (microfiber, polyester, and spandex) Stretchy and lightweight material fits most head sizes. Perfect for construction, landscaping, roofing, or for anyone working in the heat. When wet, the band provides immediate cooling that can last for hours. When dry, the band will absorb sweat and wick moisture away. UPF 50+ protection from harmful UV rays. Tapered in the back for low-bulk wear. Reflective accent for low-light visibility. Fits comfortably under any hard hat or helmet. Just soak in water until saturated, then wring out excess water: the evaporative cooling process begins instantly and lasts for hours when worn in environments with suitable airflow. Machine-washable.