The [shoe] has a Sandal Special sole and therefore a higher Rebound-Effect. The Sandal Special sole has an alternative profile and optimal grip. It is ideal for dry and squeaky floors. Other types of soles are preferable for wet, greasy or very slippery surfaces. This sole has no air cylinders because the upper shoe material is open. This type of sole offers maximum effect as well as the ultimate in training performance and absorption. The foot pressure is evenly distributed and the power supply is optimised. The elastic and springy material compensates for poor postures and misalignments.