You put your shoes ON your feet but soon you might be putting On on your feet. Swiss startup shoe maker On has just introduced a new line of running shoes that feature absorbers that company refers to as “clouds.” These are small rubber circles that act as tread but also provide some bounce. These flex and even cave in to absorb shock when runners land on each stride. The company’s tag line “Probably the fastest in the world” is unique, but hopefully we’ll get to put a pair “on” in the near future and see if it is indeed like running on a cloud.