Very comfortable and wide (7.5 D). I have very wide feet, not dainty at all, and these fit wonderful. I gave it 4 out of 5 stars, because it was slightly snug the first three times I wore it, but after that it was just right. It's airy, cushioned and supportive at the bottom and light to run all day in. I know, I know, I'm tough with my stars. I already have a pair of Asics 2150 in blue and white and it fits like a glove, so I hurried to get another one. Very happy.