This sneaker, in medium width, has ample room towards the ball of the foot but allows for a snug (narrow) fit around the ankle when laced up.  So for walking, running or biking it is extremely comfortable and stable on the foot.  The high back is soft and does not rub as I was a little worried it might bother me--but this feature, in fact, keeps my low profile socks from being pushed down.  I am also pleased with the light weight of the shoe--it probably would not keep water out of my feet through the sides but I prefer the advantage of air exchange to my feet as I walk.  This sneaker is so wonderful and comfortable that I should probably buy a few more exactly the same but they look so well-constructed that it would take me years to wear my first pair out!