Quote Originally Posted by Yaish
Those are aprons, and I believe they have been mentioned on here at least a few times in the past. As you suspected, they were for the protection of the kilt. I think someone might even have posted links to places you could still get them.

EDIT: WPG has some for sale, $35.00
http://whatpriceglory.com/scot.htm

Check the text just below the hair sporrans.
Thanks, mystery solved!
Does anyone wear a kilt protector?