Developed for women looking for a comfortable boot that instantly adapts to the shape of their feet, Salomon’s S/Pro Alpha 80 offers a new level of fit and performance. Featuring an instantly comfortable liner, this 98 mm boot delivers a strong heel lock without adding unnecessary pressure on your instep. . .The thinner plastic and strategic positioning of the 2nd lower shell buckle put less pressure on the top of women's feet and make it easier to step in and out of your boots.. The new 3D instep shell and 45° placement of the 2nd forefoot buckle are designed so women can enjoy a secure heel lock and consistent foothold no matter their instep height. The Custom Fit™ 3D liner automatically adjusts to the shape of every woman’s feet, prevents pressure points, and ensures a consistent foothold. 3D instep shell: This Shell technology, with its thinner plastic and 45° positioning of the 2nd buckle ensures stronger heel lock and more consistent foothold without unnecessary instep pressure My Custom Fit™ 3D Sport: Pre-shaped around the ankles for better fit and support, the My Custom Fit 3D Perf liner is heat moldable for extra comfort and precision.. Women calf adjuster: The Women Calf Adjuster allows more fitting options (perimeter +11mm & height +4mm) that adapt to different women's calf morphologies.. 3D instep shell|My Custom Fit™ 3D Sport|Women calf adjuster. 3D instep shell. My Custom Fit™ 3D Sport.