This is a trademarked product of the U.S. Rubber Company, named for its synthetic rubber core yarn that is covered in cotton, silk, wool, or man-made fibers. Lastex is used in a variety of items including foundation garments, socks, leggings, and swimwear.
See also Activewear; Intimate apparel.
Historical Dictionary of the Fashion Industry. Francesca Sterlacci and Joanne Arbuckle.