Yoga props were popularized by the late B.K.S. Iyengar as tools to support the body to allow a deeper expression of a yoga pose's alignment. A yoga block or yoga brick is one of the most popular yoga props to use in a yoga session. Yoga blocks are most often used as an extension of one's hands but are also used to support the back, head, and hips, and to deepen awareness of alignment. Most yoga studios have blocks available to borrow, but you may wish to purchase your own.