Yoga pants are flexible, form-fitting pants designed for yoga as exercise and other physical activities that involve bending and stretching, such as martial arts, dancing, pilates, and aerobics. They are made from blends of cotton, lycra spandex, nylon, polyester, wool, or similar light and stretchy synthetic material giving the pants a soft, smooth finish. They are also worn as casual everyday dress by many women.
According to the product database Indix, over 2,700 types of yoga pants were on the market in 2015. Styles include the traditional boot-cut and flared yoga pants with a flat waistband. Basic yoga pants are black, tight-fitted, boot-cut, flared, and reversible; they carry a four way stretch fabric and have a flat elastic waistband folded over at the top. They are used casually, around the house, as maternity wear, and for dancing and going to clubs. They are tight-fitted, giving them flexibility and comfort, and they wick moisture away from the body, helping to keep the wearer cool and comfortable. Yoga pants are increasingly used as casual wear for everyday use. 
Demand and popularity
Demand for comfortable active, athletic, sports and casual wear has increased since the turn of the 21st century. Nike, Inc. reported their women's business comprised 7 billion in 2010 and the larger market grew to $33.6 billion by 2015. Nike claims the driving factor has been by the demand for fashionable workout gear that is also flattering. New colors, patterns, and structural design of yoga pants created more versatility and increased their wear in public settings. Author Mae Anderson described the new craze of yoga pants outside the gym by calling them the "new jeans."
In the United States, reaction to the wider adoption of yoga pants proved controversial for schools. Some schools adopted dress codes banning yoga pants for all students, or banning them only for female students. Bitch magazine argued such bans are largely gendered, focusing on the damage caused by "distraction" by girls; similar complaints caused a ban in Rockport, Massachusetts, quickly reversed.
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- Media related to Yoga pants at Wikimedia Commons