Love these shoes. I have many Adidas shoes from soccer shoes , to originals to style types (nmd) and never disappoint. Wanted a gym shoe where I do some treatmill, jump rope etc . My current pair of Nikes were flat and causing pain in feet . I look at these as a good mix for gym, too heavy for real running imo but enough cushion that for short runs , sprints .Have a stable base as well and good heel cushion. I wear 12 in most Adidas and 13 in.most Nikes so I went will 12.5 and they are perfect . 12 probably would be too small. If it's a true light weight running shoe this is not it but an all around shoe for the gym , this works for me. I only paid $50 but feels like a $125 + type.of shoe