Mens Vimazi Z40 Running Shoe Sneaker Size 8.5.

I would suggest going to Vimazi.com, too much info to fit here in the discretion.   The Vimazi Z40 is specially engineered as a light weight trainer for those up-tempo days. Best for fast long runs, tempo runs, intervals and fartleks, where traction and stability are as important as minimizing weight. A supportive fit and 3-D molded heel mean comfort.  WHO IT'S FOR Regular runners who throw in hard workouts. The Z40 keeps up with you while providing that extra measure of cushioning and stability you can only get from Vimazi.  SIZING - Runs about 1/2 size small WEIGHT - 230g, 8.1oz (M9 US) STACK - 29mm DROP - 5mm PEAK FORCE SPEC - 870N in heel & midfoot, 1435N in forefoot (M10)