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The Alpinestars S-M10 Era is a premium motocross / off-road helmet designed to deliver top-tier protection, comfort, ventilation, and a lightweight build. Alpinestars+2mxrider.co.uk+2 Its shape is smooth and highly aerodynamic — free from external ridges or channels that could catch or compromise safety — which helps reduce friction and improve impact deflection, protecting the rider’s head, neck, and spine in a crash. Alpinestars+1
🔧 Construction & Materials
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The outer shell is built from a multi-composite lay-up: a high-density 3K carbon outer layer for strength and energy dissipation, a uni-directional carbon composite layer for enhanced radial strength (prevents compression but allows controlled deflection), and an aramid fiber layer for penetration resistance. These layers are bonded with epoxy resin for maximum integrity. Alpinestars SpA+1
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Inside, there’s a multi-density EPS liner that absorbs impact energy, helping spread and dissipate forces when crashing. mxrider.co.uk+1
🛡️ Safety & Protection Features
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The helmet exceeds requirements of the latest ECE 22.06 standard for both linear and oblique impacts — by around 46% for regular-speed linear impacts, and by 23–28% for low- and high-speed linear impacts. Alpinestars SpA+1
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For rotational impacts (oblique angles), it surpasses ECE 22.06’s rotational acceleration threshold by 76%. Alpinestars+1
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Removable side pads made of semi-soft polymer increase the contact area and help distribute energy. Alpinestars SpA+1
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The helmet includes a MIPS-style slip layer (“Multi-directional Impact Protection System”) to reduce the rotational forces transmitted to the head during angled impacts. mxrider.co.uk+1
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Chin-bar is redesigned: sculpted and raised to clear the collarbone, with a softer EPS liner and flexible rubber covering — reducing the chance of collarbone injury. Alpinestars+1
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Emergency systems included: quick-release visor/visor extension, and provisions for safe helmet removal after a crash (“eject helmet removal system”, “ERS”). Alpinestars+1
🪶 Fit, Comfort & Usability
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To ensure ideal fit and maximum protection, the S-M10 comes in six consumer sizes (XS-XXL), supported by four different shell sizes (S, M, L, XL) — this shell sizing solution improves anatomical fit, comfort, and impact performance. Alpinestars+1
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Internal padding is fully removable, washable, and lined with moisture-wickling / anti-bacterial fabric. 24MX+1
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Ventilation is excellent: 28 intake/exhaust ports (18 intakes + 10 exhausts, not counting the eye-port), allowing good airflow and helping keep the rider cool even in strenuous off-road conditions. Alpinestars+1
📏 Weight & Certifications
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For a helmet built with carbon composite, it remains lightweight — roughly 1260 g (size Medium, ECE spec). mxrider.co.uk+1
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It is certified under ECE 22.06 (and also meets DOT standards in certain versions) — ensuring it passes stringent safety testing.
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