It can be dicey. But you need a looser shoe. i usually readjust the laces to widen the shoe.

Also something that is really good, especially for walking around a non work environment are the fleece lined Crocs. And in the cold weather now these are awesome. i know crocs are out of style already but for our purposes they really help. Very cushy and you can throw the fleece lining in the wash to bring the fluffiness back after it starts to flatten out.

http://www.crocs.com/p/crocs-blitzen...id=23G#start=4