Similar to cushions, a yoga bolster is required for some of the most difficult yoga postures. It provides the body with additional support while bending the back, such as in bridge, supported child’s pose and waterfall pose. Performing these poses requires utmost body flexibility and proper support. If your body is not flexible enough to perform these poses, it may cause you unbearable pain and sometimes pull your back muscles too. Using a yoga bolster, you can perform difficult yoga poses comfortably and effortlessly.