I originally criticized the hat I received for being a very different color than the hat depicted. Amazon has since responded by substituting the correct picture, so I have withdrawn my original review, and now comment on the merits of the hat itself.  I am gratified that someone is listening, even if I did receive several rather nasty comments by people who disagreed with my review thinking it was directed at the corrected picture.  If I'd known the picture were corrected, I would have withdrawn the negative review at that time.

First off, I now own two of these hats, one white the other mountain.  The hats are of the highest quality, beautifully made, and fit most comfortably. Easily the best made golf or baseball style caps I have owned.  I bought the second of the two hats for precisely these reasons. That said, I bought the first hat not for these reasons, they came as happy accidents, but rather to experience Columbia's terrific sounding Omni-Freeze Zero tech. Alas, the hats don't seem any cooler than other hot weather caps I own.  And I suspect I might know why.  I own several Columbia shirts that use the same Freeze Zero materials and they work amazingly well.  Why not the hats? They key appears to be that the shirts are designed to assure the movement of air over the treated fabric and skin, and this fosters a marked cooling effect.  In contrast, the hat band, where the same kind of fabric is located, is pressed up against the head so that no air can circulate between, which I can only assume inhibits a similar cooling.  It is not that the fabric doesn't work, because it surely does on the shirts. This particular hat design is just not conducive to it.  Great idea, but not completely executed. Hence one mark down.  If you really want to see what this tech can do, buy the shirts.

Still, these are the best lightweight summer caps I have found and I am glad to have them.  I hope Columbia keeps working on the hats; I have every confidence that if anyone can invent a chill chapeau, it is they. They exemplify the best in aggressive, creative, tech forward apparel engineering.

One more thing, when you are shopping you might want to keep in mind that Columbia has two different Omni-Freeze lines, the plain Omni-Freeze, which are normal fabrics designed to be cool, and the Omni-Freeze Zero, which has the little magic dots that react to sweat and really can get cooler when exposed to air.  It can get confusing.