Almost the most comfortable shoes I have owned.  I bought a second pair so I would have one for working out and one for casual wear. Comfortable with or without socks.  The mesh fabric is VERY breathable.  I am happy for that as I don't like my feet to be hot.  If you're walking/running in an area with a lot of sand or loose dirt, it will end up in your shoe.  It doesn't bother me because I wanted breath-ability,  but be aware.