4-Quattro XT 2025Some days you like to skin up a mountain and ski fresh lines. Other days you like to charge through the resort, taking lap after glorious lap. We get it, and that's why we made the 4 Quattro XT ski boot. As a hybrid boot, it's both lightweight and stiff, with a single boot weighing just over three pounds while still retaining a 130 flex rating. This is achieved by using a plant based Griamid shell and cuff as well as four buckles and a Booster strap,