Baffin is the Best!  These boots are waterproof, very warm, easy to get on and off, close with buckle clips - which is way better than velcro or laces.
There is a draw string closure at the top to secure around your pant leg to keep snow out.  I highly recommend these boots!!
Note:  These boots "Baffin Wolf Snow Boot" are rated for -40 degrees.  If that is not enough, purchase the Baffin "Impact Snow Boot" which is rated for -148 degrees!! You won't regret it!