I hear ya grump... I just got a perforated (raptor) jacket and it's night and day to my highway jacket vents. My arms stay so much cooler! But JJ is right, our bodies are designed for under 10mph, ya know? So the sweat mechanism just won't work if it evaporates too fast. The other thing u can do is wet your shirt... that under a well vented jacket will do a lot! Or wet a hanky around your neck? I rode 200 miles yesterday in mid 80's heat so humid rain was forming right in front of me, and I was fine as long as I was moving. The second I stopped I'd sweat like a ****** in church.
