The Salomon Men's S/Pro Alpha 120 Expert Line Ski Boots '25 are built for advanced all mountain and frontside riders who demand precise fit, strong power transfer, and dependable performance in firm groomed and mixed snow conditions. Designed with a narrow 98 mm performance last and a responsive 120 flex, this boot gives skilled skiers the confidence to carve hard and maintain control at higher speeds. Salomon's Custom Shell HD construction allows bootfitters to fully customize the shell and cuff in minutes, creating a personalized fit that adapts to the unique shape of each foot. The innovative 3D Instep Shell reduces pressure on the top of the foot while improving heel hold, helping skiers maintain comfort without sacrificing performance. Inside, the My Custom Fit 4D Race Liner delivers a snug anatomical fit with thermoformable materials that adapt to the skier's foot shape for enhanced precision and comfort. The Power Spine connects the cuff and shell to increase rebound and provide strong support through powerful turns. With its advanced fit technologies, customizable tongue system, and responsive performance feel, this boot stands out as a top choice for advanced skiers seeking a precise narrow fit with exceptional foothold and progressive flex.