Love, love, love these boots!  First, let me say they look even better in person!  They are definitely waterproof & warm (I've been wearing them 2 months now.)  As far as sizing goes, I found them to run a bit big.  I'm usually a 8.5-9 and the 8 leaves plenty of room for thick socks.  I know these will last for many years and they are an investment!  Oh, the fur is attached to the boot liner, not the boot.  Should you decide you want to wear them without the fur, just purchase a replacement liner.