This is could also be known as FNV : Commercial 9.
This was a popular items for Canadians’ Christmas wish lists in the early 1970s: the Olympic 80 mini ski. A affordable plastic ski where you could just tight to your regular winter boots. Many serious ski areas didn’t allow them, but I remember seeing them on smaller local hills in and around Montreal. This was one of many K-Tel products that sold everything from cheesy record compilations to kitchen knifes.
A variation of the Olympic 80 mini-ski were sno-snakes, which could be use to slide and skate on snow.
Super Slider Sno-skates