Alpinestars · S-M5 Action · Alpinestars S-M5 Action
Alpinestars S-M5 Action Hi-Viz Yellow
DOT, ECE 22.06
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About the Alpinestars S-M5 Action Hi-Viz Yellow
Dirt/MXDominate the track and trail with the Alpinestars S-M5 Action in striking Hi-Viz Yellow. Engineered for serious MX riders who demand uncompromising safety without sacrificing style, this helmet features a sleek, aggressive profile that cuts through the air with minimal drag. The advanced composite shell is reinforced with high-impact materials to withstand the rigors of motocross racing, while the integrated MIPS system provides an extra layer of rotational protection in critical moments. Experience superior breathability through strategically placed vents that channel airflow efficiently, keeping you cool during intense laps. The interior padding offers a custom-molded feel for maximum comfort, ensuring focus remains on the ride. With its bold colorway and premium construction, the S-M5 Action is not just protective gear; it is a statement of performance and precision engineering designed to keep you safe while looking unstoppable.
Technical Analysis
The S-M5 Action utilizes Alpinestars' proprietary Multi-Directional Impact Protection System (MIPS) integrated within a lightweight composite shell to mitigate rotational forces during off-road impacts. Its aggressive aerodynamic contouring reduces wind buffeting at high speeds, while the extensive venting network ensures thermal regulation without compromising structural rigidity.
Safety & Aero-Acoustics HUD
SHARP impact test results pending.
Moderate: Balanced road noise levels.
High Flow: Dynamic multi-channel active venting.
Where to buy
All online retailers
Price History
Interactive Size & Fit Finder
Designed for dirt/MX riding with high-visibility yellow color; specific fit details vary by head shape and size selection.
How to measure
Wrap a cloth measuring tape around your head just above your eyebrows and ears. Pull the tape comfortably snug, read the length, and repeat for consistency.
Available Colors & Graphics
Regional Legality Guidance
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