I have wide toes & narrow heels (duck feet) so I wear a lot of clogs - Merrell clogs -because everything else rubs my heels raw. I saw these in a store, but not in my size, so I ordered them from Amazon. Even as a Merrell lover, I really didn't believe I could wear them without socks. Surprise! I wore them a whole day, walking quite a bit. And another day. And another. Not even red spots on my heels. And my toes are very happy with so much space. I'm not a runner, but I walk a lot. I need to order another color.