A ski touring boot is made of two main components. Shell and liner. Every ski touring boot is only as good as its boot liner. But it depends significantly on the harmonious nature of both. A boot liner of thicker materials promises higher comfort and more support on the descent. Thinner liners by DYNAFIT are true lightweights with optimum walkability without a great loss in downhill performance. For most of our ski touring boots there are several boot liners. Thus guaranteed is an individual fit to your needs and your foot.