The plastic 'plate' supporting the blades on the soles of these shoes have both cracked in half, despite the fact that I've had these shoes for about a month and half - during which time I have barely had time to jog in them (probably 5 times total). I've worn them a few time a week around the house, to the mall, and to walk the dog around the neighborhood, but this has all been VERY low impact. I weight about 160 pounds. UNLESS YOU ONLY PLAN TO WEAR THESE ON CARPETS INDOORS WHILE BEING A 103 POUND WOMAN, do NOT expect these to last. I may have jogged/walked a total of 30 miles in these things, and both pairs have cracked in half on the bottom. Look at the other reviews about these things falling apart - it boggles my mind that Adidas ever let these things out of the R&D lab, because they fail spectacularly in the real world.