This Jantzen suit was almost a bra and pants bathing suit but had a thin isthmus of material between top and bottom. Sun bathing had by now become a national craze, and women let down suits when no one was looking. :0 !
By 1936, bare midriff suits like this one were widespread. It is really the Riviera maillot cut in half. The bra was ot shaped but it was still too much for Rye, New York and Dover, New Jersey, where it was banned.
In 1938, "lastex" suits, very tight with molded bras, were worn everywhere. It was also the era of the clammy, easily torn, all-rubber suit. This was about the last summer that men wore any tops.