User Review: Vasque Men's Sundowner Summit GTX
These boots were very comfortable from the beginning, but I found they have a major flaw. I do a lot of hiking on uneven terrain and noticed my ankle turning unexpectedly. I constructed a jig for measuring the thickness of the heel with insoles removed. Two other pairs of boots that I use measured 1.25 and 1.5 inches. The Summit GTX measured 2 inches.
It is elementary physics that as the heel becomes thicker, one's balance becomes less stable when at an angle. Friction contouring on sloping sandstone could be risky. Although the Summit GTX is the most expensive of the three pairs I use, I have relegated them to hiking where the chance of injury is least.