Keep cool with the MiraCool Bandana from Occunomix. Just soak in cold water for 10 to 20 minutes to activate cooling. Stays hydrated for several days. Reusable over and over again. Fabric is 100 percent cotton with advance polymer cooling crystals that pump up to cool you down. Just tie around your neck. Cooling sensations pass to pulse points and are carried throughout your body. Turn over occasionally to refresh cooling sensations.