I have several. Two from quilt shops, some big scrap pieces from a carpet store, and I bought the large rug size from online from EcoRugPads. All of them shed some around the edges when used. If the iron is on highest setting the fibers will turn brown but hasn't been a problem so far. I made muslin slip cases for the smaller mats and cut the bigger one to fit my ironing board and use a fitted unlined board cover over it. I have the Steady Bettye too and I like it because the block/fabric pieces do not move when pressing. I am the type of person that wants to know what works and worth the money for me so I compare items for myself.