The Salomon Women's X PRO 80W Custom Heat Connect All Mountain Ski Boots are unstoppable with famous performance and fit, with the addition of a digital connected heat solution. With instant fit adapted to women, and efficient power transmission brought by 3D liner and Twinframe shell design, X PRO 80W is a great choice for all-day, all mountain skiing. And the Custom Heat Connect system lets you adjust the temperature of the integrated boot-warmer via bluetooth from your mobile device. The new Custom Heat Connect system is an integrated heat system built into the liner, that connects to an app on your mobile device. Adjust the warmth as needed, on the fly!