MR840 running shoe. Bought these at the local New Balance store,paid more than at Amazon,but needed to be fitted. I am a 77 year old active man and walk a lot for my exercise. These shoes are great,but salesperson talked me into a size 12.5,needed a 13 because after a few days, it seemed my toes were being "squeezed" too tight, otherwise very happy with these shoes, Must add that an insole was recommended too replace the New Balance factory installed insole. Another expense! But all seems to be helping with the low back pain as well as cronic sciatic pain.