Mission Athletecare Enduracool Bandana USA Flag Cools Instantly When Wet to 30 below average body temperature Premium fabric dries soft. Lightweight & Breathable. UPF 50 protection against the harmful rays of the sun Chemical-free,Reusable & Machine Washable When dry, the soft fabric absorbs sweat and wicks moisture away from the skin To activate cooling technology: Get it soaked, wring out excess and snap three times. Typically, bandana cools for up to 2 hours when wet. To reactivate, simply re-soak and re-snap the bandana.