As theirbest-selling expert boot for years, the X Pro 120 leaves a formidable legacy, but theycan't think of any way the new Salomon S/Pro 120 Ski Boots aren't an improvement. The iconic Custom Shell HD fit is still there, with a tad more room over the instep. Responsiveness takes a quantum leap forward with the introduction of Coreframe construction - the fiberglass reinforced midfoot insert keeps the shell from deflecting under heavy load and rewards the skier with "right now" turn response. And for those who were bothered by the liner seams over their pinky toes, the new My Custom Fit 3D liners are SEAMLESS. Win, win, win.