3x Ergodyne Chill-Its 6702 Evaporative Cooling Bandana Relief / Black ( New ) Cooling Bandana with Polymer Embedded Batting Material / Tie Black No Slime Polymer Technology - water absorbing polymer crystals are embedded in bandana material and will not ooze or become slimy Lightweight Cooling - batting material minimizes uneven expansion of polymer crystals when wet for cooling without the bulk Easy Activation - soak in cold water 2 to 5 minutes to activate, no ice or refrigeration needed Long Lasting Cooling - remains cool for up to 4-hours to help reduce effects of heat strees 1 Size Fits Most - tie-back to ensure a close fit to the head, neck or wrists Care Instructions - hand wash only and store by hangi in the open air until completely dry