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Trekmates Cooling Crystal headwear contain polymer crystals that are stitched into the front of the headband of the hat. Once submerged in water (for approx. 4 mins) the crystals will absorb and retain the water keeping the wearer cool for several days before they dry and slowly return to their original state, ready to be re-submerged. For extended cooling effect they can be refrigerated or placed in freezer.
Simply immerse in water to activate cooling process Keep you cool in the heat for several days Lightweight and comfortable Non-toxic polymer crystals Reusable over 1000 times
