Chung Shi Women's Yvonne Comfort Step Walking Shoe The revolutionary AuBioMo-system is available in 2 versions: Balance Step and Comfort Step. The balance step is a more fitness-oriented shoes with much focus on stimulation of the balance ability, muscles toning, constructive effects to the foot architecture and improvement of the blood circulation. The comfort step has the same benefits as the balance step, but to a lower degree. The comfort step is focusing on the comfort, fast adaptation - about 2-3 days for most users - and for long wearing.