It's red bandanna fabric, looks like it's braided...with a knot on one side with the ends sticking out. I can get pics if I need to...I don't have any right now.
I ended up getting the thing in a box of books my mum gave me last week on vacation. She said..."I don't know what that red bandanna thing is, but I think it was yours."

Since I don't use these collars, I figured I'd give it away to someone who would use and enjoy it!
Just PM me if you're interested...first come, first served!