This is one of my favorite boots.  The boots are waterproof, and don't make my feet sweaty when inside.  They are nice enough to wear to work, but comfortable enough to wear all day.  I bought have a size up to wear extra socks and that is fine.  That said - keen sizing is all over the place.  There is an elastic insert that I didn't really notice in the picture when I bought it.  I didn't like it at first, but it does keep the boots comfortable and you cant see them underneath your pants.  It has the added bonus that if you get caught in a downpour or snow you have room to tuck your pants in.  These save me from wearing frumpy boots and having to carry an extra pair to work