Aluminum boat floor

[J Berg]

I need y'alls help. I got a 16ft flat with and aluminum floor in it. It had rhino line on the floor but it was startin to peel off so i just went ahead and removed it. What is that stuff called that some ppl are starting to put in their boats, its almost like a rubber but feels kind of has a felt feel to it. I dont want carpet or more spray in liners. I've seen the stuff in several different places but have no clue what it is called. Any other suggestions would be great.