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True Functional Ventilation (TFV) system channels airflow through intake and exhaust ports
offers protection and support
Exceeds the requirements of JASO MA2
Robust formulation maintains film thickness and viscosity stability across all operating temperatures to minimize chain and gear wear
Multiple intake and exhaust ports
2025 Alpinestars S-M5 Solid Helmet Size:X-Large True Functional Ventilation (TFV) systemALPINESTARS SUPERTECH M5 HELMET HELMET FEATURES The SM5 helmet has been designed to provide MX riders with a helmet that is safe and purposefully designed to deliver optimal protection and comfort. The lightweight SM5 helmet features a thermo injected shell incorporating a special polymer blend enhanced by varying degrees of thickness that is engineered to deliver the optimal combination of impact protection and light weight, while the five density
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