Last year we took the Phase franchise to the next level with the Phase BOA? Pro and this year we're continuing the progression with a Step On? model. We added top-of-the-line tech to the simple skate-inspired upper starting with the lightning-fast Dual Zone BOA? Fit System equipped with our patent-pending SUPERLOCK heel harness to eliminate heel slipping and deliver a more responsive ride. And this year we made further upgrades by using our super-responsive R2 liner with the extra warmth of PrimaLoft? insulation. Simply put the Phase BOA? Pro Step On? is one of our most advanced women's boots ever.