The trick to the layered look is making sure the layering pieces are not bulky. See that the underlying tunic/dress is silk or a light material like the Tibi dress below. Wear the wrap dress loosely tied like a coat. Add opaque tights and t-strap heels and you are good to go.
Tibi Silk Print Dress Net-a-Porter
Diane von Furstenberg ‘Jewel’ Cashmere Wrap Dress Nordstrom
Black or Charcoal Tights My Tights
Charles David Trumult T-Straps in Dark Brown Kid Zappos
– Lauren DimetSee the Top Ten Summer 2016 Trends for Women Over 40