Along with many other designers, Gernreich took advantage of the development in the mid-1950s of upgraded machine-knitting techniques to produce his work. Double knitting (which was developed in Italy) enabled the mass-production of easy-to-wear knitted suits, coats and dresses that retained their shape and became a key American look in the 1960s and '70s. Another knitwear development involved varying the lines of the classic T-shirt so that it could be extended into dress-length versions, long or short sleeves, and other variations, including, by 1960, a sequined long evening version by Kasper for Arnold & Fox. In the 1960s, American sportswear depended on very simple shapes, often made in vivid colours and bold, geometric prints (such as those by Gernreich and Donald Brooks).
You might be more familiar with No Bull’s pricey lifting shoes, but did you know they make apparel, too? The brand identifies its target consumer as one who trains hard and doesn't have time for excuses, insisting that its gear will show up if you do, but it can’t show up for you. The clothes are everything you need to workout, and nothing you don’t.
Sportswear is an American fashion term originally used to describe separates, but which, since the 1930s, has come to be applied to day and evening fashions of varying degrees of formality that demonstrate a specific relaxed approach to their design, while remaining appropriate for a wide range of social occasions. The term is not necessarily synonymous with activewear, clothing designed specifically for participants in sporting pursuits. Although sports clothing was available from European haute couture houses and "sporty" garments were increasingly worn as everyday or informal wear, the early American sportswear designers were associated with ready-to-wear manufacturers. While most fashions in America in the early 20th century were directly copied from, or influenced heavily by Paris, American sportswear became a home-grown exception to this rule, and could be described as the American Look. Sportswear was designed to be easy to look after, with accessible fastenings that enabled a modern emancipated woman to dress herself without a maid's assistance.