I normally never wash the foam.. been using them for about 6 years.. foam
gets messy but dries out ok..
crass ad   we of course sell these pads ..tried many but still like this pad
the best.. it wears well , the new foam lasts  very long..years.  and really
helps with poor saddle fit   
our prices are one for all .. so far ...$115 plus shipping ..
roger r