Fengbay Women's High Waist Yoga Pants Fengbay yoga pants are moisture wicking with 4-way stretch material that promotes both compression and support. Non see-through fabric - perfect for yoga, exercise, fitness, any type of workout, or everyday use. Power Flex Yoga Pants combine fashion, function and performance. The material is thick enough that not see through if you bend over, but not too thick that it becomes hot and uncomfortable.