regarding the 'onucze' and their use.
Your Mom is non confused at all.
Onucze were worn in tall boots and in 'walenkach' as well in pre-war Poland, both by men and women. They were strips of good cotton wound around one's feet and calf/shin and when one stepped into these boots onucze kept our feet warm. I used them regularly in Poland. You see not everyone had 'skarpetki'.
There was a much shorter version for ankle boots.
I must say that in very smart - going to church tall boots - one did not use onucze.
In Russia it was different and onucze were worn both in one's boots and on the outside one had wrappings tied up with string at the top- similar to onucze - to keep the snow out of one's boots or walenkow.
In England in the countryside people who layered - and in some areas still do - hedges to form thickets, often wear similar wrappings around their legs, but for a different reason; namely to keep the rats out of their leggings.
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