From the Decades of Style website:
Here's a vintage pattern from the 1940s that is perfect for hot weather. It is a long line brassiere top and a pair of pleated shorts. The Front and Side Front pieces of the Brassiere Top are cut on the bias
Brassiere top is fully lined and buttons in back. Shorts button at side waist. Use firmly woven, medium weight fabrics: linen, denim, poplin, cotton, seersucker.