Designed by and for avid backcountry chargers, the Scarpa Maestrale RS Alpine Touring Boot offers an impressive balance of uphill comfort and downhill performance. To limit compromise, these boots offer a burly Speed Lock MLT walk mode that locks in 60 degrees of motion for effortless strides on the skintrack, an alpine-influenced 125 flex that drives power to our skis on the descent, and a thermo-moldable Pro Flex Performance liner that eliminates rubbing and blistering on the uphill while locking our heel in the pocket on the downhill.