Assos ss cento and equipe are both summer weight, both have a snug race fit. I have the latest ss cento and if you hold the back up to the light it is pretty see through, they say you should wear a base layer with it. I haven’t actually had a chance to ride in this one yet, between the random weather and my work schedule unfortunately.
The voler caliber kit I have is nice too, obviously not as richly appointed as the Assos stuff but still very nice, breathable soft fabric also with a race fit, but the fabric has some stretch to it o doesn’t feel constrictive.

For sizing reference I’m 5’11” / 157# and wear a Medium in all the above-so true to size for me.