The-new-Quantum-ST-PRO-features-the-lsquo-rsquo-long-oval-rsquo-rsquo-head-shape-This-specific-shape-offers-a-longer-front-to-back-distance-&-a-slightly-smaller-side-to-side-distance-compared-with-the-standard-Arai-head-shape-This-shape-offers-new-levels-comfort-for-many-European-riders-who-will-experience-that-the-Quantum-ST-PRO-will-fit-them-perfectly-The-Quantum-ST-PRO-is-a-knowledged-as-the-premium-sports-touring-helmet-preferred-by-experienced-touring-&-sports-riders-alike-Features-longer-outer-shell-Sc Lc-Super-complex-Laminate-construction-longer-shell-&-interior-shape-are-specially-designed-for-riders-whose-helmets-can-cause-a-painful-forehead-lsquo-rsquo-hotspot-rsquo-rsquo-due-to-an-interior-shape-that-isn-rsquo-t-made-to-fit-your-longish-head-One-piece-rear-exhaust-extracts-hot-damp-air-from-the-helmets-interior-&-improves-aerodynamics-Three-position-chin-vent-Emergency-Release-System-Ecopure-interior-Offers-a-thinner-chin-liner-&-rear-padding-for-more-room-around-the-nose-&-mouth-area-PRO-Shade-System-offers-an-efficient-combination-of-an-easy-to-flip-up-lockable-sun-peak-Facial-Contour-System-Convenient-speaker-pocket-Washable-interior-Double-D-ring-device-5-year-limited-warranty-This-helmet-comes-standard-with-a-clear-visor