Reversible, crushable, foldabe ranger type hat with full brim. Contains non-toxic polymer crystals that evolve into a gel when immersed in water, effectively hold 1000 times more water than its own weight. Soak in water for 5 minutes and keep cool for hours! . NLFhat stay hydrated and cool the wearer, due to evaporation, for several days before they dry and slowly return to their original state. No refrigeration is necessary and the hat are usable time and time again. Great to fight outdoor summer heat and even a protection in case of emergency.