Intuition Alpine LinerALPINE liners perform well in most standard shells and applications. Theyre most suitable for intermediate to advanced level skiers and riders. Based on one of the original Intuition designs, the medium thickness, high density, wrap style liner improves skier performance and endurance. 8mm thick sole provides added support and warmth under foot, making additional foot beds optional. The Alpine is a medium volume liner and works best with a shell fit*