For a refined fit that enhances performance, the boot’s liner and shell can be fully customized. A dual entry instep makes it especially easy to get in and out of the Sportmachine. To provide a more neutral stance that improves balance and minimizes fatigue, its cuff can be adjusted to better cradle the contours of your calf. And for additional warmth, its liner sports Primaloft insulation. Push your limits in comfort with the Sportmachine 90.