Quality Castelli! I like the high rise in the front of the bibs (ride to drink more beer!), not the current low cut bib style. Medium size was spot on, 3-4-5 hour rides are fine in 100 degree temps. Time will tell if they will last more than a season with a nice rotation of my other bibs.
I ride 4 times a week with the club, 3short days and 50-70 miles on Sunday. The chamois never feels soaked. Best shorts Ive had for hot weather butt comfort. Im 61, 155, and wear a large. I know that now, after having bought a bunch of these. The new model has a sturdier bib section, and it seems to be no hotter than the old, cheese cloth mesh top. These shorts wear out first in the butt cleavage zone. They go into see through mode before they get baggy, or show other wear.
I thought they might be a bit too tight when I tried them on. After my first ride I was sold! Fit is great, they stay quite cool, and the chamois is a delight. The logo on the thigh is wearing off as is one of the reflector hits. A bummer but still great bibs!