6601 Evaporative Cooling Towels provide cooling relief when wet. Just run them under water for one minute or until saturated, wring out the excess water and allow the cooling relief to do the rest. PVA cooling material absorbs water, and once it starts evaporating, the cooling sensation begins. Relax in the heat knowing the cooling features will keep you from overheating. Reduce the chances of heat exhaustion and fights fatigue while working or playing outside. Towels can even bring down fevers, hot flashes or night sweats. They are great for working construction, landscaping, mining and more. Towels are even beneficial for outdoor activities like hiking, camping and fishing. Thin, lightweight material can easily fit around your neck or head to keep you cool in the heat. If they start getting too dry, most likely 4 hours after a single soak, then just re-wet and use again. Towels are machine-washable with mild detergent and should be air-dried.