With a knit upper, the shoes really feel and look apart. The upper is not super stretchy which means that it is also not going to lose its shape in time, even after a hundred miles. Overall, the shoes are comfortable as they even come with extra padding as you look away from the forefoot towards the heel. In terms of comfort, you can also count on the adaptive technologies used by Brooks which works great on a number of surfaces. With durable blown rubber with horizontal grooves, the shoes are easy to walk and run with for long periods of time.