BodyFulcrum® 2 inch Comfort Green medium firmness with Extra Height. Recommended for those people who are tall or those who need support to their existing arching lumbar curve. Whose abs, core, hips, and low back pain may require extra fulcrum height. Athletes, people who are 6' or more, flexible backward bending. Those who have a heavier lower body/thighs such as skiers, rowers, hockey and football players, weight lifters, gymnasts, figure skaters, swimmers, ballet dancers. This 2" base may work better if you have already used the 1" Premium size and you have improved back flexibility or could not feel your abs and core engage. Do not start with the 2" height if you do not meet the above criteria as this may cause pain. Please email our website if you have questions.