The one I have is definitely silnylon, very slippery and no visible coating on one side, it is like this one http://www.endicotts.co.uk/product_info.php?products_id=1332
The one I have is definitely silnylon, very slippery and no visible coating on one side, it is like this one http://www.endicotts.co.uk/product_info.php?products_id=1332