Alpinestars SM3 Heat Helmet — Size S, Black, Red, White

The SM3 Heat helmet is engineered for aggressive trail and enduro riding, balancing ease of use, comfort and impact performance.

The thermo-injected shell uses a multi-thickness polymer blend to deliver optimized impact protection with reduced weight.

A patented low-friction coating applied to the inner liner reduces rotational acceleration during oblique impacts by creating an internal slip plane that mimics the brain's natural cerebrospinal fluid protection.

The visor release system is designed to release at a predetermined force to reduce neck loads in an impact, while an advanced ventilation layout provides 10 inlets and 7 exhaust ports for effective heat transfer.

Material composition: 48% acrylonitrile-butadiene-styrene, 20% polyurethane, 16% polystyrene (expanded polystyrene), 6% polypropylene, 4% polyvinyl chloride, 2% ethylene-vinyl acetate, 2% steel, 1% expanded polypropylene, 1% polyamide. ⚙️