Shoe is light and very comfortable but after reading a previous customer review about the shoe running small I took there advice and odered 1 size larger than what I actually wear and they were right! I am a female and have very flat feet and find men's gym shoes more comfortable. In men I normally wear a size 8 or 8 1/2 depending on cut. For this shoe I ordered a 9 and it fit as if I bought my normal shoe size. So for as comfortable, light, and breathable as they are they do run small and compared to other Nike gym shoes I've worn.