now as we all know after time magnet's become week lets just hope its not on my face when i find this out .
A cheaper manufactured magnet will lose its effectiveness over time but we would notice it gradually. You would most likely feel the degradation while putting on this cap during use over the years before it would suddenly fall off during a shave. I’m betting based on the price that these aren’t rare earth, I could be wrong but that is my guess and would lose effectiveness down the road.