They are generally arranged in groups, the most important of which are the Mahavidyas (great sciences), the 8 (or 9) Mataras (mothers) or Mahamataras (great mothers), consisting of the wives of the principal gods; the 8 Nayikas or mistresses; and different classes of sorceresses and ogresses, called Yoginis, Dakinis and Sakinis.
While this practice may sound too advanced for many yogi and yoginis, there are many opportunities for beginners.
For yoginis looking for colorful flair, try some of the styles on Fit Couture, Bali Dog, Bikram Yoga Wear (especially the tiger short!), and Lavinia Lingerie.
Not all yoginis agree with the practice of nude yoga for men or women, feeling that the inevitable sexual overtones take away from the sacred Hindu practice.
However, there are enough naked yoga women enjoying and benefiting from the experience that the trend is spreading, with many yoginis expanding their training curriculum to include the practice.