The S/RACE Classic boot delivers both precise fit and ultimate snow feel. A second-skin construction wraps the boot snugly around the foot and the heel adjustment allows for on-the-fly fine-tuning. UK Sizes CHASSIS: Carbon 3D Classic The carbon fiber chassis combines lightness, excellent power transmission, support, control and exceptional torsional strength, while keeping a suppler front area for classic. HEEL ADJUSTMENT: Adjustable Heel Strap Adjustment strap around the back of the heel for precise heel-hold, comfort and performance. LACING: Dissociated Quicklace Salomon's patented technology, the dissociated lacing system allows adjustment of forefoot or upper foot tightening by pulling different parts of the Quicklace™. OUTSOLE: PROLINK Racing classic This racing outsole with low profile offers abrasion resistance and flexibility, maximizes power transfer, and delivers exceptional snow feeling and optimum flex for classic.Fits NNN Binding.