The QST Pro 100 TR Ski Boots give you all the options an all-mountain maven could ask for -- skiing, hiking, skinning and just hanging out in total comfort in remote places are all on the agenda, it's up to you to fill in the blanks. s famed 100 mm last, patterned off the best-selling X Pro, fits a wide variety of foot shapes with no modification and can be adjusted with the Custom Shell heat molding process to fit many more. With a grippy touring sole and Dynafit-certified tech fittings you have the ability to hike and tour to the best untracked powder stashes anywhere in the world.