I am not completely positive on this , but I believe that the Silvermax brand has more of the silver fibers in it than the X-Scent brand. I know that the X-scent ( which I have 2 sets of) have 5% of the X-static fibers in it. I know that after I bought them I found that the other brand I saw had 10% and I think that it was the Silvermax. Not for certain but I think that is what I remember.