A: Sweetheart neckline, lined front, contrast band, open back with clasp
B: Twist-front swimsuit with lined front and closed back.
Choice of fixed or adjustable straps. You can mix and match fronts and back (for a twist front / open back or sweetheart front / closed back).
For a tummy control effect, line the front with powernet and use the closed back.
This pattern also makes a great danse or skating leotard!