The DS MX 90 is designed to deliver a high level of performance in a boot with a wide, 104mm last, allowing aggressive skiers with wider feet to have the warmth, comfort, and power transmission of a high performance boot. Intermediate to advanced skiers who seek precision in a boot with more generous foot volume will love Dalbello's exclusive Contour 4 Fit Technology, with contours inside the shell at the critical fit areas to provide the ultimate out-of-the-box fit. TruFit Sport innerboots also contribute to enduring comfort and warmth. Dalbello's GripWalk soles are also included, making it easier to walk around the resort. Before using your new boots, you must have an authorized Dalbello retailer check your boot, binding, and sole setup. Dalbello boot soles must only be changed by an authorized retailer.