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The Alpinestars SM3 Helmet in Heat Gloss Yellow Fluo and Black offers advanced protection and comfort tailored for motocross, enduro, and off-road riders. Its shell features varied thickness construction, combining impact-resistant thermoplastic with a thermo-injected polymer blend that balances lightweight design and high-impact protection. The helmet's outer shell is engineered for durability, while the inner shell utilizes a six-piece EPS liner with five densities, effectively managing impact energy and reducing overall weight for enhanced rider performance. The polished inner liner, coated to minimize friction, works in conjunction with the protective EPS foam to manage rotational impacts and oblique collisions, providing comprehensive impact absorption.