esigned to cool important pulse points longer and narrower than the MiraCool Bandana, with plenty of fabric to ensure a secure tie. Reusable thousands of times. 100% comfortable cotton fabric helps keep perspiration out of eyes. MiraCool Crystals encased within the Headband hold a generous amount of cool water for highly effective evaporative cooling. Designed to cool important pulse points, the MiraCool Headband is longer and narrower than the MiraCool Bandana, with plenty of fabric to ensure a secure tie. MiraCool Crystals encased within the Headband hold a generous amount of cool water for highly effective evaporative cooling.