The time of triple digit temperatures is upon us, so dare I ask, what is a girl to wear? Shift dresses are possibly the easiest style solution for all seasons, with a simple, A-frame shape that gives you room to move, and transitions from day to night with a simple switch of the shoes and accessories. These charming numbers are just a sample of Lulus summer-approved shifts, in lightweight, airy fabrics with cute cutouts and sleeveless silhouettes to keep you cool.