I had a Z1R helmet a few years ago it was horrible loud, ventilation was horrible and going do freeway my head was constantly bounced around. I bought a scorpion exo 400 to replace it and it was way better I could feel the air flowing through the top vents and no more of my head bouncing around, no fogging, but the shield didn't seal tight and would let water in if it rained I thought the helmet was great I still have it. I then bought a shark s900 and quickly realized the scorpion was very heavy. The shark doesn't fog, flows a ton more air, is quieter than the scorpion, and the shield seals tight.