Micro swimsuits are very revealing versions of regular forms of swimwear, using much less fabric. A popular example is the microkini, a smaller, skimpier bikini with typically enough coverage to prevent nudity.
Women's swimwear was once very bulky and uncomfortable, but in the 1940s, Louis Reard, a French engineer, developed a two-piece swimsuit composed of a top and bottom piece. His new swimwear was meant to allow women to have more comfort while swimming. This started a trend that saw the continued minimizing of beach clothing, leading to the micro swimsuit. Reard named his invention the bikini, which was after a nuclear test site, because he thought that the excitement that this beach apparel caused was similar to a nuclear explosion.