it inflates in milliseconds to reduce up to 95% impact energy

derived from Alpinestars' premium Supertech Racing Gloves

backwards or sideways movement of the head while motorcycling

Shoe-like comfort with boot-like protection

Elastic cuffs

ymh s m 3 hlm ece 06 Size:M it inflates in milliseconds toEngineered for MX and off road performance, the S M3 Helmet features an advanced thermo injected shell with a specialized polymer blend for optimized impact protection and lightweight agility. Rigorously tested to ECE 22. 06 standards, it integrates a patented visor release system and a low friction internal coating to significantly reduce rotational acceleration forces. This helmet delivers superior ventilation through seventeen ports and includes a