Yoga Pants according to wikipedia is called: Flexible, tight-fitting pants designed for yoga, as well as other activities that involve a lot of movement, flexion and stretching. Some of the other activities include: martial arts, dancing, pilates, aerobics, discos, etc. These pants are usually made of cotton, spandex, nylon, polyester or a lightweight and elastic synthetic material. They are usually black and have an elastic waist folded at the top. Although it has been specifically designed for yoga, the pants are also casually worn by women in daily life.