These have become my favorite shoes. I just took the Vapor Gloves to Paris, France- and found myself wearing them to walk on every surface I could there: pavement, cobblestone, metal and wood on bridges, even the wet dirt from rain-soaked trails. They are extremely flexible and light-weight, and you can feel EVERYTHING under your feet, which really connects you with whatever you are doing, wherever you are. Quick notes: I will probably end up buying yet another pair of these and alternating between pairs on different days, because if worn constantly without socks (as I do), they tend to get a little stinky... but they are easy to wash (washing machine or sink-safe). Also, If you are between shoe sizes, get the smaller size. Like other reviewers (and Merrell) suggest, these run half a size large.