Bandana by Miracool. It's what's inside that cools! MiraCool Cooling Crystals absorb and hold up to 1,000 times their weight in cool refreshing water. When hydrated and worn against head, neck, or body, The Physics of Cooling Evaporation simply and naturally create cooling sensations that are carried throughout the body. Hand washable.New lightweight design with the same cooling power and all of the comfort of 100% cotton. The Original! MiraCool® product video Dangers of Heat Stress video ...