The Sidas Central Overlap is a thermomouldable liner suitable for alpine ski boots thanks to its height. It provides maximum comfort for the shins with a reinforced closure flap. The Central Overlap is part of the ' Black Project', a customised ski boot, personalized by a range of Sidas certified boot-fitters, using the best of the current available technology. Features Sidas' new liner thermoulding technology now lets us fit your liner as best as possible to the shape of your foot. For optimum results, an insole adapted to the shape of your foot & the activity to be practised should be used (Volcano, Flashfit or Custom). The thermo-moulded liner is heated at a constant temperature in a fan oven. It is then moulded into a suitable ski-boot shell for a pre-determined length of time. After a few minutes the liner is thermo-moulded to the shape of your foot. Providing maximum comfort & reducing muscle fatigue. Boot Fitting Locations