A Cami is nice to wear to work, I have one right now under my shirt, absolutely hidden, a bralette would work also but I do not have bralette, wearing a Bra for me would be nice in the Winter would be hidden because I drive a Truck, in the Summer like now, people would probably notice it, in the fall it would be hidden, now depending on what you do you can wear a Cami over it to conceal it then a thick loose shirt to hide it, I wear a Bra around Toronto like that, good luck.