Great hat! Excellent quality and great customer service and warranty!
So I did a bunch of tests for hours in direct sun to see which was cooler, a wool hat or a straw hat (Montecristi-style Panama Hat) and I was surprised that the WOOL hat seemed to keep you cooler, especially if there is not much breeze. My guess is that the thickness of the wool acts as insulation and doesn't allow the heat of the sun to penetrate to your head, while the lighter hat had better ventilation but the heat goes right through to your brain. Wool is also known to keep you cool as the Bedouins and other desert dwellers have learned: In hot temperatures, wool absorbs moisture from skin and helps to dissipate heat more rapidly.