Enduracool instant cooling accessories by Mission cool when soaked with water, wrung out, and then snapped in the air to activate the cooling properties. The technology works by absorbing moisture and perspiration into the fabric core where the unique radiator-like fiber construction circulates water molecules and regulates the rate of evaporation to create a prolonged cooling effect. To activate cooling technology: get it soaked, wring out excess and snap three times. Typically, cooling accessories stay cool for up to 2 hours when wet; to reactivate, simply re-soak and re-snap. Wear around your neck, head or other hot zones to help you feel cool and go harder. Washing/care instructions: machine wash cold, with like colors; do not iron and do not bleach; no fabric softeners; tumble dry low after washing or line or air dry after each use. For best results, allow up to 1 1/2 minutes for towel to reach optimal temperature.