I've only had a them short time and everyone says they're not as good as the old IVs. See attached: http://images.tripleblaze.com/blog/wp-content/uploads/2010/07/IMG_0602.jpg Those were my first pairs of Hi-Tecs and they were stupid awesome. Still have them, still love them in their worn-out state, but Hi-Tec doesn't make the IVs that way anymore and now I'm suspicious. So I've taken a leap of faith and purchased Vs.<br /><br />I'm slowly breaking them in, haven't left pavement yet. Worn them for most of the day walking back and forth to school. The heel is designed so that you really do kind of roll in your step where as my old IVs were more Clop Clop. They do sweat my feet, but then I generally put foot powder in any non-breathing shoe if it's over 70-75 degrees in the area.<br /><br />This review is subject to change, but so far I like 'em. And if you're the kind of show-off hiker poser who tucks his pants behind the tongues so they're sticking out (like me), you should know they don't lay as flat and upright as my old IVs did.