I bought this shoe as I love zip up shoes.  I went up a half size as I usually where thicker socks in the fall and winter when I go walking.  When I first got them they were pretty tight and I couldn't wear them with thick socks at all.  I wore them around the house for a couple days just to see if they would stretch out any.  They did. Now, I wear them walking every morning.  I still can't wear heavy socks with them but regular socks are fine.  I have Reynaud's Syndrome (poor circulation) so I thought wearing wearing thinner socks might not keep my feet warm. I was wrong there too.  They are insulated very well and I have not had cold toes yet and I have walked on some 10 degree mornings.  They are very comfortable now that I have them "broke in".  The tread is deep and I have not had a lot of trouble on slick roads.  The traction is very good.  I would recommend these shoes.