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The quick verdict: The value sweet spot of Salomon's Supra platform: a 90 flex that skis stiffer than its number, a fully moldable shell and liner, and GripWalk pads included. Serious boot, sensible money. ~$420
The buckle-closure Supra 90 GW sits below Salomon's BOA-equipped Supra models and shares their thin-wall, wrap-style fit. America's Best Bootfitters testers rated the Supra platform highly, praising a roomy toe box paired with a secure heel and ankle, and found it stiffer and more stable than typical 90-flex boots. The whole customization stack is here: a heat-moldable S/Pro CF liner and Custom Shell HD, which lets a shop oven-mold the shell itself to your foot. GripWalk ISO 23223 pads come pre-mounted. Women's versions run the same recipe as the S/Pro Supra 80 W GW and 90 W GW.
Early intermediates with medium-width feet who are progressing quickly and want one boot to carry them for years. Wide feet should start with the Atomic Hawx Magna 90X GW or the Rossignol Evo 70 HV+.
See where it fits in our Ski Boot Sizing Guide. Other boots from that guide: Rossignol Evo 70 HV+ · Nordica Speedmachine 3 100 · K2 BFC 80 · Atomic Hawx Magna 90X GW.