My shell pants have a cluster of patches on the inside of each knee. My Gaiters are untouched. I have a tendency to turn my foot inward when high stepping. It does not help that the shell pants are more geared to skiing than ice climbing, and so are a bit loose in the legs. I just keep slapping patches on them. Fortunately, they are inexpensive Gore-tex pants from EMS. Another good sale score. Climb on.