This Athleta Cross Train Tankini ($74) has a built-in bra with a flowy bottom to keep things both secure and loose as you swim. Athleta Cross Train Tankini. From. $74. $74 at athleta.com.

Shop these vibrant, printed swimsuits from Athleta Girl to get a stylish and sustainable summer look. ... A bit on the more subtle side is the Athleta Girl Camo Tie Dye Tankini Top ($32).