Crafted to enhance your performance and comfort, Salomon's S/PRO SUPRA 110 boots prioritize superior foothold and optimized power transmission for a wide range of foot shapes. The Custom Fit 4D liner with latex foam can be molded to tailor the boots to your specific needs, while the 3D instep shell technology minimizes instep pressure. Skier level Beginner Intermediate Advanced For skiers that can comfortably ski across the whole resort and are keen to get better on icy slopes and in variable conditions. Stiffness Soft Medium Hard A flex rating between 80 and 100 for women, and 90 and 110 for men, ideal for intermediate-level skiers. Boot width Narrow Medium Wide A last width between 100 mm and 101 mm (MP 26. /26.5), considered average, offers greater volume and a more relaxed fit ideal for most skiers. To identify one's preferred last, the foot's width between the first and the fifth metatarsal bone is measured to gather an overview of the skier's natural foot shape and volume.