I bought these because I have an issue with my knee.  My doctor said to buy the best running shoes I could afford.  I didn't listen to the other reviewers and bought my normal size.  I had to send them back, and a half size larger worked great.  I spent my first day in them on my feet almost the entire day.  No pain, my feet stayed cool, and folks went crazy over the colors!  Wore them with black jeans and a lime green t-shirt.  Love Asics, this is my second pair!