Excellent info in Brimstone's post. Thanks! This information will also be useful for us northerners, since we get a lot of our rain during the hot summer months.
The sham-wows also work as quick-dry towels. I take a stack of cheap cotton washcloths or shop rags in a plastic bag for drying my eyeglasses. These can also be used to wipe your shoes and the bike itself. They are more absorbent if you wash them in a washing machine before first use to remove the sizing.