6632 Cooling Skull Caps wick away moisture when worn dry and provide evaporative cooling relief when worn wet. Caps are designed with stretchy knit fabric for UPF 50 plus sun protection against harmful UV rays. An elastic band lines the interior for a snug and comfortable fit. Soak durable fabric in water until saturated and then wring out water. Evaporative cooling process will begin and last for hours. Just reactivate by wetting it again. When wearing skull caps dry, the moisture-wicking fabric will absorb sweat and keep you dry. Anti-odor treatment keeps skull caps smelling fresh. Reflective accents ensure workers are seen in low-light conditions. Low-profile design fits comfortably under a hard hat or helmet and is great for construction, landscaping, roofing or anybody working in the heat. Use caps to reduce the risk of heat stress while mountain biking, motorcycling, hiking, and more. The sustainable fabric is machine-washable.