I wear Sweatvacs. I pack 2. After the first is saturated (can be wrung out) I hang it on the left side of the handle bar and put on the 2nd. With luck by the time the 2nd is equally saturated the 1st one is dry and cool.
And for those in the Lone Star State there is a patriotic version!
http://www.amazon.com/SweatVac-Skull...1647364&sr=8-1