3PCK-Miracool Headband - Cooling Lasts for Hours - Re-Usable - NAVY 3 PACK! 3PCK-Miracool Headband - Cooling Lasts for Hours - Re-Usable - NAVY A MiraCool headband keeps your head cool and comfortable, even in the hottest summer weather. This affordable cooling headband holds MiraCool crystals that absorb 1000 times their weight in cold water. Hours of cooling relief! - Long length for easy wearing - Designed to cool important pulse points