bc...the problem we have down South is that it's 98 degrees and 90% Relative Humugity. You sweat, and it has no where to go, as the air is almost saturated anyway, so you just stay soaked all day, and have to drink lots of water every stop. Riding, or any other outdoor activity in temps near 100 or greater...everybody really needs to pay attention to their body. Covering up, especially in the dry heat of the Southwest, is a good idea as it helps retain some moisture that you don't even realize you're losing 'cause you might not be sweating much. In the South, we really have to worry about our core temp getting too high because the body simply cannot cool itself off in this humid heat. Just have to stop more often and cool down. Most of us don't drink enough fluids while riding, IMO. Myself included...