I have had 2 Shark RSR helmets, the RSR1 was the lightest and quietest helmet that I have ever owned, I used it for up to 8 hours a day for a fortnight whilst rattling around the coast, and never had a problem with it.
The RSR2 that I have now is heavier than its predecessor, and not quite as quiet, but still a very good lid.
Ideal for colder days due to the 3mm thick visor.
Dark visors are readily available on the internet, and the linings are all machine washable.
I use my Shark helmets as a second/winter lid, keeping the Arai for nice days