The utilization of P-Skin and Mesh allows a high comfort level and "maltreatmentproof" materHO easy to maintain as well. This is particularly important in Tri where the material is severely tested. The STF1 shoe has the same characteristics which allowed the brand beeing known in the surrounding such as rapid entry/exit system drawn in order to make the foot rapidly and INSTANTANEOUSLY feeling well in the shoo. The large Velcro strap allows the volume to be tightened around the foot. Other technical assets like the he fastening for rapid sliping, the one and large Velcro strap make the reputation of the brand. The differentiation of the carbon thickness and the particular orientation of the threadbares allow to have more important rigidity on several points. It is the only one sole 100% carbon having a replaceable heel pad. This sole is devoted to competition sport.