Regulus is Unparallel's stiffest aggressive shoe. According to the manufacturer, it is designed to bring comfort and excellent precision for versatile climbing. We at Boulderkeskus recommend this shoe especially for bouldering and climbing on training boards precisely because of the mentioned features. The stiff sole of the shoe provides support for the leg muscles and enables very efficient and precise use of force with foot holds. The amount of rubber on the toe hook and the grip properties are also exceptionally good. There is also quality material inside the shoe, as the soft and seamless lining fits around the foot like a comfortable sock. We do not recommend the shoe for climbers with wide feet.