There are a staggering amount of choices in the marketplace now, the picture on the left I can vouch for as I used it in Lake Mead a few years ago. It did a great job for several hours in 90 degree heat. I bought the one with replaceable cooling packs(I kept them in a cooler), which was handy for the extra trip to the Grand Canyon that day. The picture on the right is made by Artic Online, I have not used it, but my Facebook friends speak very highly about it. It looks very well made and I was impressed with documentation on the site.
Not only do I embroider these quite often, I wear them too. They really work! As with many of the cooling products they do not work as well in high humidity. Manufacturer description - CoolMax , a Great Way to Keep Your CoolLook and feel comfortable in CoolMax. Our newest polo lets you dress for dinner without sacrificing vacation relaxation. Made of the comfortable, moisture-wicking, wrinkle-resistant CoolMax knit
Since skiing is not an option anymore for me and it is cold here in NY. I spend way too much time inside during the winter I refuse to spend all summer inside too. If anyone has any suggestions for their favorite product please leave it in the comments below