For those not secure enough to wear an opened side shirt. A great way to  still look good is to go with a lace/sheer bra underneather. The Nylon  Spandex Stretch Floral Lace Bra from AA is always popular choice  coming in a variety of colors. To match it with a tank top, try the Unisex Big  Pocket Tank, the Unisex  Tri-Blend Tank or any crop top. As summer heats up and this look  makes a stronger return from last year.

