Ergodyne Chill-Its 6700 Evaporative Polymer Cooling Bandana - Tie Closure, Blue LONG LASTING INSTANT COOLING RELIEF Can last for up to 4 hours on a single soak. Simply re-soak to increase cooling duration EASY TO USE AND ACTIVATE Soak in ice water 2-5 minutes or until plump , ring out excess water, and it's cool! Avoid oversaturating or oversoaking. Secure around head, neck, or shoulders for cooling relief as temperatures rise. DURABLE AND REUSABLE Product can be re-used over and over again. Just re-soak to activate WIDE VARIETY OF USES Reduces the effect of heat exhaustion and fights fatigue while while working or playing in the outdoor summer heat. Can also be used to help bring down fevers, hot flashes or night sweats HAND WASH Use mild detergent, rinse and blot dry