Keeping Cool at 100+ I guess most folks agree that with low humidity and high temps, evaporative cooling works great and even better if you wear a jacket, such as a Darien, First Gear, etc. But with very high humidity such as we experience in coastal Texas, Florida, and Louisiana, evaporative cooling doesn't cut it. BTDT, but I've discovered something that works even better. http://glaciertek.com/cooling.htm When combined with a fully zipped-up Darien, the Glaciertek CoolJacket will make you COLD even if it's 110 and 90% humidity. Having the fully-sealed jacket on makes the vest work like the heat pump of a central air unit, drawing body heat to the CoolPacks . The vests aren't cheap and, yes, you need to "recharge" the CoolPacks about every two hours. But you really can get them frozen again with nothing more than a pitcher of ice-water AND THEY WILL KEEP YOU VERY COOL. Like 65 degrees cool, regardless of the outside temp. Wearing the jacket zipped up is analogous to having good insulation on your house with these puppies, in so far as you're keeping the hot air OUT so that the 'Packs can do their job of drawing the heat off your body. I got mine last July (AFTER my SS1K unfortunately!) and wore it on a daily basis through August and September, commuting at rush hour in Houston traffic for a 60 mile round trip. For next summer, I'm thinking of getting a second set of CoolPacks to keep in a small cooler of ice water, so that I always have a set charged and cut down the time I spend recharging. Highly recommended for those of us running in the swamps down here! Dennis Moser