I'm guessing theyre made out of Neoprene, black rubber with some material on top....
I have a white set which are stained,ive washed them but still they dont come out white as white....any info on whether i can bleach them or something?..will it destroy the rubber?
They go on a set of NOS White B2's,which are lovely by themselves,but the donuts make em look f00ked