PRO TOUR liners are best for back-country, tele, and touring applications. A lace up, tongue style liner available in 3 Volumes: HV (High Volume, thickest), MV (Medium Volume), and LV (Low Volume, thinnest), to accommodate a range of shell fits. These dual-density, light weight liners feature a softer flexing lay-up, and a roomy toe box for maximum comfort on long tours. The strategic rear panel increases range of motion for tour-ability while the stiff upper cuff offers solid support and responsiveness, enhancing performance both ascending and descending. This model can be worn out of the box, heat molded with the home fit kit or fit by a professional boot fitter.