>>310139664
The silicone one just slips over the the default gasket, and it is indeed impervious to sweat, the main benefit over the default gasket that just soaks it up until it's damp. OTOH it's slightly annoying when the sweat instead starts dripping down your face, but at least you can wipe it off with a towel. Since it's just on top of the original gasket, the fit is basically identical as is the padding.