I do not own a piglet but I set my small look a like high banker up the same way and I have UR mat under my hog moss. It my also be Yukon that's my observation. I have had good success with the UR, hope that helps.

It's definitely not UR. 

My Piglet has it too and I've always wondered what it is. There is nothing like it in the current catalog.

I suggest contacting the gold hog team or Doc himself they will give you your answer. Hope this helps.

post a picture, side view of the mat

He has a link to a photo of the side view in the original post.

Two years and no help?  🤨 

It's "mud mat."

81,

No, no idea where that mat came from - but some ideas do come to mind.

1. It could have been some experimental design (I doubt Gold Hog's) that the former owner (if the Piglet was bought used) got from somewhere, or even made in the garage.  Wherever it came from it was simply integrated with Gold Hog mats as a grand experiment.  It looks as though some inventor created some very busy mat design or at least found some experimental mat from somewhere in the world. 

After testing where you work if it works well just keep it.   Set up, play with it a little and don't mess with success.  If it isn't so good then rip it out and install UR mat.

Joe S