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Alpinestars · S-M5 Action · Alpinestars S-M5 Action

Alpinestars S-M5 Action Hi-Viz Yellow

DOT, ECE 22.06

About the Alpinestars S-M5 Action Hi-Viz Yellow

Dirt/MX

Dominate 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.

DOT, ECE 22.06 Intermediate Oval S-M5 Action Family Composite 2 year warranty Dirt/MX Riding Mid Range

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

Awaiting SHARP Audit

SHARP impact test results pending.

ECE 22.06 None
Aero-Acoustics 98 dB

Moderate: Balanced road noise levels.

Ventilation Flow 8/10

High Flow: Dynamic multi-channel active venting.

Double D-Ring 🔊 Comms Ready

Visor Features

Pinlock Ready Optically Correct
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Where to buy

Best price $249.95 Amazon

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Price History

Interactive Size & Fit Finder

Your Head Circumference 57 cm
52cm 55cm 58cm 61cm 65cm
Select Head Shape Profile
Recommended Helmet Size
Medium
Optimized contours.
Perfect for standard intermediate head profiles.

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

US

Status: Legal

Required: DOT

Compliant with FMVSS 218 standards for off-road and street use where applicable.

EU

Status: Legal

Required: ECE 22.06

Meets current ECE 22.06 safety regulations for motorcycle use.

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