UK sizing. The S-Lab Ultra is made for fast going. The shock absorption is on medium Salomon level, striking a very nice balance between responsiveness and softness. The 8 mm drop helps even beginners direct their force forwars. - Standard Salomon fit - EVA midsole with EnergyCell+ element for enhanced power transfer - EVA insoles - Renewed Matryx upper for better breathability and reduced overall weight - SensiFit system: the shoes tighten around your feet in a very uniform, comfortable way - Versatile Contagrip TA outer sole - Reliable Salomon QuickLace system - Heel to toe drop: 8 mm