These things just hug my feet and don't let go. I normally wear around a size 8us mens street shoe, and I decided to get a 39.5EU size. I have wider feet, so I tend not to downsize as much as some other people, plus I don't like my shoes hurting so much that I don't want to wear them. I probably could have gone down to a 39EU, but I would probably get 39.5EU if I get them again, which is highly probable. I used them in the gym a lot, which I'm kind of regretting due to the fact that I am now going to need a new pair soon. I do mostly technical face climbs, and some overhang. Absolutly love the fit and performance. The biggest con is the price, which is why you probably don't want them for casual use. Use them for working harder routes on small holds or overhangs.