One of the worst purchases I have ever made on Amazon.  The low level of insulation I can deal with since I can always wear extra socks.  But footbed of these boots are not even flat - they are concave!  Which makes the least supportive, and most uncomfortable boots I have ever owned.  Then to boot (pun intended) the support around the ankle is so bad that they caved in on my first wearing and rubbed my ankle bloody.