Great for all-day recreational skiing Roxy's Wista Ski Boot is a flexible design with a bi-injected comfort shell. While other ski boot manufacturers typically list a range of flex index numbers from 130 (racing stiff) to 45 (flimsy stiff) Roxy didn't give us those numbers for their boots. What we can tell you is that the Wista Ski Boot has plenty of flex for all-day comfort that compares to competitor recreational boots that fall in the 60-65 flex rating categories. Inside you'll find a Natural toe box last with a soft liner that insulates almost as well as it supports. The four micro soft alloy buckles have quick-set adjustable catches for dialing in a female-specific fit that matches your skiing style.