(Instructional Photos showing Liner and Earcup Remove/Install) The Perfect Choice for your Dual Sport Unit!! Arai's SZ-LE2 Series continues to push the envelope in open-face helmet advancements with a distinctive shell shape and a four-vent airflow system (two front, two rear). This system not only pushes more cooling air into the interior but pulls more hot air out, because Arai has learned that the best way to cool a helmet is to do both. The SZ-LE2's advanced, detachable flip-up faceshield has Arai's Brow-Vent ventilation plus the exclusive "Super AdSis" tool-less shield-changing system with a pre-curved, super-scratch-resistant shield that minimizes distortion and maximizes UV protection. The SZ-LE2 shares the same sizing, liners, and ear cups used in the Classic-LE2 for superior all-day comfort.