Description Ergodyne 6602 Blue Evap Cooling Towel INSTANT COOLING RELIEF – Run under water for one minute or until saturated, wring out excess water for drip free cooling LONG LASTING – Can last for up to 4 hours on a single soak. Simply re-wet to increase cooling duration HOW DOES IT WORK? – Cooling PVA material absorbs water and creates a cooling sensation as it evaporates REUSABLE & MACHINE WASHABLE – Air dry until material is stiff, re-wet until soft. Machine washable with mild detergent, air dry only HEAT STRESS PREVENTION – Reduces the effects of heat exhaustion and fights fatigue while working or playing in the heat. Can also be used to help bring down fevers, hot flashes or night sweats