This will be my third pair of ECCO Men's Track II High boots. I will start out by saying that they are very comfortable and the uppers are bullet proof. The weak link is the sole. It is an injected/molded design which cannot be replaced (with same design). The outer material wears quickly, exposing the black injected foam. Once this happens, the sole will wear quickly and the boot will have to be re-soled. When I sent mine to Ecco, they charged me $75.00 and replaced the sole with a hard Vibram sole. Completely changed the characteristics of the boot...no longer a "cushy" ride! Contacted Ecco customer support and got noooo response. Opposite of Keen which will do anything to make their customers happy...disappointing!