4 pack Miracool Cooling Bandana, Camo Desert Flage, Khaki, 940 DFL 100% cotton 4 pack, bandana, desert flage camo & Khaki - 2 of each Soak for 10-20 minues minutes in cool water, for hours and hours of use. Reusable thousands of times 100% cotton fabric provides comfort and increases alertness without the need for ice or freezing polymer cooling crystals plump up when soaked