Originally Posted by
WhyFi
I still haven't warmed to the idea of an additional layer for anything other than additional warmth - maybe I'll get there some day. In terms of the Castelli, yeah, it would look nice peeking through an unzipped darker jersey, but showing through a jersey wouldn't be appealing to me at all. I don't know why, but I just don't like transparent/semi-transparent garments.
Some of my bibs have straps that don't feel great on bare skin. I always use a base layer with them, just for the added comfort and aside from whatever ventilation/wicking/cooling measures they potentially provide.