This is the second pair of these I have owned. I finally wore the other ones out and was so worried I wouldn't be able to get another identical pair. Here is what I use the shoes for, I weight train in these 2 hours a day six days a week for over a year. I also run 30 to 40 minutes a day or do other cardio, P90X. These shoes are so comfortable and they breathe. The hard outer instep helps your back and form when doing lower leg work like squats or deadlifts.  If you need training shoes and you aren't a marathon runner, get these. Truly great cross trainers.