Some people predict that the new alpine Boa® systems are going to slither in to a lukewarm reception; we think they're going to roar on the ski boot scene like an avalanche - and one of the main reasons is the new Salomon S/Pro Supra BOA 120 Ski Boots.Just when you thought the Custom Shell HD fit on the best-selling S/Pro 120 couldn't get any better, the Boa® Fit System evens out the pressure over the top of your foot and makes it possible to tension the boot tighter with less discomfort and looser with better control - you can dial the tension up or down incrementally by reversing directions on the dial. The S/Pro Supra Boa® 120 also uses an improved My Exowrap™ 4D Performance liner and updated shell construction using Sensafit Mesh rather than the previous CoreFrame.