http://www.motorcycletoystore.com/sport/shop.php/helmets/arai/arai-rx7-corsair-full-face-helmet-john-hopkins/p_3206.html

Product Information
Arai RX7 Corsair Full Face Helmet - John Hopkins
* Relaxed Round Oval interior for enhanced fit.
* "Delta-3" top center intake scoop, scavenges more air to help improve airflow even further.
* Shell incorporates a reduced gap between the shield and shell to minimize wind turbulence over the shield and onto the shell.
* Chin vent design, with dual pivot hinge mechanism, allows for a more easily operable single span vent gate with an increased airflow capacity.
* Enhanced organic shell shape, bottom trim and (non-removable) neck roll which curve in at the bottom to give a more natual appearance, which also helps minimize wind turbulence.
* Rubber breathguard, designed to better direct fresh air to the inside surface of the shield while simultaneously directing hot breath down and away from the inside surface of the shield.
* SNC "Structural Net Composite" shell construction, utilizes a patented shell construction that incorporates a structural net reinforcing material, embedded between Arai's exclusive Super complex laminated construction layers, which improves resistance to shearing forces. This allows for more weight to be removed from the top of the shell, both reducing overall helmet weight and improving the center of gravity.
* Shell mold features to strengthen the shell, enhance airflow and overall appearance.
* Type-8 diffuser design with redesigned and improved intake and exhaust ports to both improve airflow and reduce wind turbulence.
* "Dry-Cool" liner material, with a rich color and perforated satin feel, utilizes water cells to improve moisture and heat transfer from your head into the airflow around Arai's unique space frame liner. Leaves your head dryer and cooler at the end of a long or hot ride and allows the liner to dry much faster in between rides.
* SAJ side pods have a lower profile and are much more flush with the shell of the helmet to provide a much cleaner look.

英語でRX7-RR4？の仕様を書くと、上記のようになるらしい。
暇な時に、解読してみてください。

最近は、RedBullに始まり、栄養ドリンクのスポンサードが多いですね。

下の動画は、レースサポートしているライダーのヘルメットに、捨てバイザーを装着している様子。
貴重な映像かもしれないです。



See Arai tecnicians working on top Superbike, Supersport and Supersport riders' helmets during Superbike 2008 w.e. in Misano.
捨てバイザーの固定は、セロテープを使用するらしい。

The Arai Helmet Europe story
http://www.youtube.com/watch?v=2nDNJm9S-bg
Arai technical assistance on track in Superbike
http://www.youtube.com/watch?v=Pmg0uwesaOs