3 layers worked to block my Samsung S22 Ultra (s-pen phone like Note) from strong magnets on case.
I wanted to be able to use a "LoveHandle Pro" phone grip/ stand with my Samsung S22 Ultra,  but the strong rare-earth magnets on the grip interfered with the function of the SPEN stylus on my phone's screen.<br /><br />3 layers of this material worked to totally block the magnetic interference (actually better than the thicker/ more expensive "GIRON").  It was a bit of a DIY project to cut the material to shape,  laminate 3 layers using spray adhesive, grand the edges smooth / even,  and then mount on the phone case,  but the end result was exactly what I was looking for and a solution that doesn't seem to exist pre-made anywhere in the market.
Rating: 5 stars