From the BGB Retro and Vintage Swimsuit Blog:
This cute style is back, in black and white! The Retro One-Piece Swimsuit from Rock Steady has a cute red heart-shaped button detail at the bust. The cut and style of this suit is designed to flatter all body types and sizes, with a full bottom and side ruching. Every rockabilly gal should rock this suit in and outside of the pool!