The Fall 2023 update to the PRO TOUR liners are best for backcountry, tele, and touring applications. A lace up, tongue style liner available in three Volumes: 15 mm (High Volume), 12 mm (Medium Volume), and 9 mm (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 alternate tongues and the supple cuff offer solid support and responsiveness, enhancing performance both ascending and descending.