100% Microfiber Proprietary technology cools to 30 degrees below average body temperature when wet Chemical-free, UPF 50 protection from the sun; helps defend against dust, debris and wind. To activate cooling technology soak in water, wring out excess and snap three times; one size fits most Typically cools for up to 2 hours when wet; to reactivate, simply re-soak and re-snap. Can be worn in more than 12 ways including as a headband, scarf, neck gaiter, hood, cap, do rag, facemask and more. New in box. Smoke free home.