What is "fusable interfacing" and who uses it to make kilts?

[Paul Henry]

from my earlier post......

fusible interfacing can be useful , but you will find very few professional tailors making quality garments who use it much or often.It does have a place of course, and it can be useful.....

I've been very careful to make things clear that it's not for me, I haven't ever said that it can't be used