Not sure what lenses you were using to read the טהרת מים. Here is a screenshot of page קפב with highlights added.
thats exactly what i was reading
nothing that u highlighted says anything different,
if u are referring to his mention of shoes, he is trying to say that a beged of rubber would be mekabel tumah because it is a material used in shoes
i attached an image of the same page highlighting all the terminology he uses, which is only terminology related to begadim