The family of MiraCool products keep you cool all day! The MiraCool cooling crystals encased within 100% cotton fabric absorb and hold up to 1000 times their weight in cool refreshing water. Soak the MiraCool product in cold water for a few minutes. It will stay hydrated for several days. When worn against head, neck and body, cooling sensations are passed to pulse points and carried throughout the body. This will greatly improve productivity in a warm environment-indoors or out. The bandana protects your neck from UV sun rays. Assorted colors. Sold by the dozen.