This 120-flex boot may look to be purely plush—that merino wool insulation is oh so comfortable—but it friggin’ rips. Rossignol’s Sensor Blade shell, an aerodynamic construction in which excess polyether plastic material is removed from the lower shell, helps shed weight. The flex can be adjusted between 110 and 120 via two screws on the spine and the boot is also compatible with rockered WTR soles.