I bought a Shoei TZ-X helmet a couple of months ago. Best fit out of anything in the shop. Had Shoei before, going back years and years. Bit more than I was looking to spend but that's ok. I've used it for commuting ever since and it's been great but hadn't managed to get out on the open road until a few weeks back. This must be the noisiest helmet I've ever had for wind noise. The problem seems to be the gap under the ear just behind the jaw bone. Stick your thumb in the gap and the noise goes away. Effective but not practical. A bit of research found the Shoei Whisper Strip. It's a U shaped curtain that fits around the base of the helmet, covers the gap and smooths the airflow. So I bought one. Does it work? Yes I reckon it reduces the wind noise to better than average against other helmets I've had. Is it worth it? Yes, but I reckon as a fix for a known problem, it should have been supplied with the helmet as standard not as a $45-$50 accessory. If you are going to buy one of these helmets, try and get the Whisper Strip included in the price.