Ran about 40 miles in these. I got hurt outside of running and have to take it easy on distance. i These are super light weight!! Open to offers. The inserts are Curex Low profile run pro. -S curved winged NYLON plate for extra pop for daily usage. -Ultra light PWRRUNPB foam cushioning for efficiency & speed. Soft and lightweight -SPEEDROLL for better heel to toe range with less effort. Ability to run faster, not harder -FORMFIT & XT-900 rubber. Best for faster running/workouts, races, or everyday training!