Once on my feet, the first thing I noticed was how light in weight they are. I was effortlessly bouncing around in them as I warmed-up to embark on a quick 5 mile training run with them. As I got running, my feet felt very light, and each stride I took was comfortable and bouncy. This may partly be as I felt well rested, but the shoes were definitely playing a huge role in contributing to my comfort. The main facts and specs of these shoes are as follows: