The Salomon Shift Supra BOA 130 represents the apex of alpine touring engineering, meticulously engineered for advanced freeriders demanding uncompromising performance across diverse mountain terrain. This technical powerhouse seamlessly bridges the gap between efficient backcountry ascents and aggressive resort charging through a sophisticated integration of proprietary technologies and precision-manufactured components.
At the heart of this boot's architecture lies the revolutionary Custom Shell HD construction, utilizing thin-wall polyurethane manufacturing that positions the foot in intimate contact with the shell while maintaining structural integrity. This advanced polymer composition ensures consistent density distribution, delivering predictable flex characteristics and optimized power transmission vectors from boot edge to ski edge. The shell's integrated low-tech inserts are machined directly into the polyurethane matrix, eliminating potential failure points while providing bombproof compatibility with pin-style touring bindings.
The Exobelt system represents a quantum leap in closure technology, combining high-tensile textile reinforcement with the precision BOA Fit System's steel cable network. This hybrid approach generates exceptional heel retention forces while distributing pressure evenly across the foot's dorsal surface, effectively eliminating hot spots during extended touring missions. The micro-adjustable BOA mechanism allows for precise tension modulation in 1mm increments, ensuring optimal circulation management throughout varying activity intensities.
Cuff engineering centers around Salomon's proprietary polyolefin construction, selected for its superior impact resistance and thermal stability compared to traditional polyurethane alternatives. The Freespine backbone creates a direct mechanical linkage between cuff and shell, establishing a rigid power transmission pathway that maintains alpine-level responsiveness during aggressive skiing. Frictionless polymer pivot bushings eliminate binding and stick-slip phenomena during cuff rotation, enabling fluid walking biomechanics throughout the full 50-degree range of motion.
The Twinlock mechanism's horizontal engagement geometry prioritizes mechanical advantage while minimizing accidental release potential. When engaged, the PowerWedge insert transforms the Freespine into a progressive flex system, allowing controlled forward flex under load while maintaining lateral rigidity for precise edge control.
Internal foot retention utilizes the My Custom Fit Freeride 4D Race liner system, featuring anatomically pre-shaped construction with strategic Talyn foam placement for enhanced responsiveness. The elastic toe box accommodates natural foot expansion during exertion while maintaining precise heel pocket geometry. Heat-moldable zones throughout the liner allow for customized pressure point elimination and enhanced comfort during extended wear periods.
The Sensitive² footbed incorporates dual-density construction with a rigid heel insert for enhanced stability and performance-oriented foam layering that provides feedback sensitivity crucial for technical skiing. The Midgrip sole system integrates Contagrip rubber compounds between traditional boot lugs and GripWalk pads, creating a versatile traction platform effective across rock, ice, and variable terrain conditions.
