I was worried about the seams when I first got this, but hasn't been an issue. Great for cooler rides, but doesn't get too hot when the temperatures rise. Fully recommended!
Works well, keeps you warm on chilly days.
Can't ask for more.
This incredibly comfortable base layer fits my 5 foot nine inch 165 body perfectly in Medium size. I've even wore it as a casual T shirt on cool days. Definitely a, "Darn I wish I had bought another one when I found this on sale.", when it wears out.
Warm from 40-60 degrees. No moisture buildup. Bought this in my normal size, medium unlike all other Castelli products that I size up.