Although there is not much difference between ordinary sneakers and running shoes, we cannot run in fashionable sneakers or casual sneakers. We can only wear running shoes to run. Athletic sneakers are a bit heavy compared to running shoes because the proportion of leather material on the upper of sneakers is higher to provide a more supportive fit for sideways movements. Therefore, we often need to buy two kinds of sneakers, one to wear during the week and one to change into when playing sports. This is very troublesome.