HJC F70 Red Bull Spielberg Ring Full Face MC-21SF Mens Motorcycle Helmet. Just contact our support team. Checkout safely with peace of mind. Shell constructed of a high-tech fibreglass composite. The abbreviation for Advanced Channeling Ventilation System (ACS) is Advanced. MultiCoolTM technology in the interior. HJ-26ST Pinlock®-Ready Anti-Scratch Shield is included in the package. Sun Visor HJ-V9 with a Larger Field of View. Double D-Ring D-Ring Retention Strap. A chin curtain and a breath deflector are included. ECE and DOT regulations apply. Construction of an advanced ...