I went on a weekend trip over one of our scenic mtn passes. Tons of bikes out (I was driving my diesel p/u with a camper so slow speeds for me). Its interesting on who wears gear. Sport bikes and sport touring/naked (VFRS, Bandits, etc) riders wear full gear. Harley riders wear some leather but not much. Now a ton of those custom choppers are running around and they wear nothing. T-shirts, shorts, whatever. Guys on old bikes wear a little bit of everything. The level of riding experience seems to go with the amount of clothes they're wearing. Most of the major clothing mfgs have some type of warm weather mesh gear.