REI top

Photo: Courtesy of REI

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A higher neckline with the look of a layered cami, thicker straps and a built-in shelf bra offer additional coverage and support for bigger busts. And the Empire-waist cut will graze over your middle while you work off any postholiday bulge. Bonus: Two built-in back pockets give you a place to stash your cell phone and locker keys—meaning you'll never forget them in the cup holder on the treadmill again.