At work place, I usually wear tubetop bras, sometimes with pads. Today one of female colleague recognized my wearing padding, and commented I have better wear them only under dark-colored tees. Last week, I wore a white tube top bra under a white tee without padding, but she noticed it, as the tee was so transparent.
Outdoors, I usually wear nude bra under A-cup bra or sport bra, which make me look having A-cup boobs. B-cup bras are too big for me as they can make me look ludicrous (too big boobs to too skinny trunk).
In summer, silicon nude bra under sports bra is comfortable for me.
Barbie~~