Winter slopes activity (6)
![Ross](/clue/static/ross-mug.min.png)
I believe the answer is:
tubing
(Other definitions for tubing that I've seen before include "Hose or piping" , "through which water may be circulating" , "Length of hose or pipe" , "Cylindrical length(s) of metal, plastic etc" , "Hollow cylindrical containers, collectively" .)