You charge the hat by running it under cool water; after its excess water is wrung out, the hat keeps your head up to 30 cooler than the outside air temperature while keeping you dry and comfortable. The Hydroweave system combines hydrophilic (water-attracting) and hydrophobic (water-rejecting) fibers in a three-layer fabric that conducts body heat upwards, while retaining the cool water and releasing it slowly through evaporation; even while the middle layer holds onto water, your head remains cool and dry thanks to an inner lining that water cant permeate.
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