Gap GapFit Impact Blackout Longline Cut-Out Back Sports Bra The printed Gap GapFit Impact Blackout Longline Cut-Out Back Sports Bra ($33, originally $40) offers medium support and a quick-dry fabric that's breathable no matter what workout you're doing. (And, fine, the cutout would look cute peeking out of tank tops, too.) Image Source: gap.com Gap GapFit Impact Blackout Longline Cut-Out Back Sports Bra $33 from gap.com Buy Now