Ergodyne Chill-Its 6603 Evaporative Cooling Band, Blue LONG LASTING INSTANT COOLING RELIEF Can last for up to 4 hours on a single soak. Simply re-wet to increase cooling duration EASY TO USE AND ACTIVATE Run under water for about a minute, twirl in the air, and it's cool! Secure around neck and shoulders for drip-free cooling relief as temperatures rise. ADVANCED COOLING TECHNOLOGY: made with absorbant and hyper-evaporative PVA material that holds more water and creates a long lasting cooling effect making it the most effective cooling towel on the market. CONVENIENT SIZE: 4" x 29.5" DURABLE AND REUSABLE Product can be re-used over and over again. Let air dry (material will get stiff), re-wet until soft and it's ready to use! 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 MACHINE WASHABLE Treated with antimicrobial to prevent mold. Wash in cold water with mild detergent and air dry