Whether we are replacing packed out liners or looking for more performance and comfort out of our backcountry touring ski or snowboard boots we reach for the Intuition TOUR Tongue DD 12mm Liner. This thermo-moldable liner molds to our feet for a precise fit, offers 12mm of thickness to prevent a sloppy feel, and offers hinge points in key areas so that we can utilize all of the range of motion from our walk mode on the ascent.