There have been various posts on this subject, some suggesting that they merely covered the front of the kilt.

I think that I havementioned that there would have been all sorts of variations in use, something I still stand by.

However I'm reading a book about the 9th Glasgow Highland Bn [HLI] in WW1: and quite clearly they show pictures of the apron going right round the kilt-so the back as well as the front is covered.

James