The Alpinestars SM3 Heat helmet is engineered for motocross, enduro, and off-road riding, delivering a balanced combination of impact protection, low weight, ventilation, and rider comfort. This extra-small helmet features a gloss red, white, and black finish and uses a thermo-injected shell made from an impact-resistant thermoplastic polymer blend. The varied shell thickness is designed to optimize protection while helping reduce overall weight. Manufacturer part number 8301026-3126-XS and vendor part number 8301026-3126-XS identify this specific configuration.
Inside, the SM3 uses a six-piece EPS liner with five distinct densities to manage impact performance in targeted areas. A low-friction coating on the main EPS liner and polished inner surfaces help reduce friction and rotational acceleration associated with certain oblique impacts. The composite fiber layer positioned between the outer shell and EPS liner adds another level of impact protection. Crown and cheek pads allow the fit to be tailored to the rider, while the removable cheek pads and Emergency Release System support safer helmet removal after an incident.
Ten intake vents and seven exhaust ports promote airflow and heat transfer, with the visor directing air toward the ventilation channels. The visor release system is designed to release at a predetermined force to help reduce forces transmitted to the rider's neck during an impact. Recycled materials are used in the comfort liner to help reduce environmental impact, and integrated hydration tube channels in the cheek pads improve convenience during extended rides. A soft 1-inch chin strap and stainless steel D-rings provide secure, comfortable retention.
Designed for riders who need dependable off-road protection and adaptable comfort, the Alpinestars SM3 fits motocross, enduro, and other off-road applications. Select the XS size only when it corresponds to the rider's proper head measurement and helmet fit requirements.
Features:
- Size: Extra Small (XS)
- Model: SM3 Heat
- Brand: Alpinestars
- Manufacturer Part Number: 8301026-3126-XS
- Vendor Part Number: 8301026-3126-XS
- Color: Gloss Red, White, and Black
- Application: Motocross, enduro, and off-road riding
- Shell Construction: Thermo-injected impact-resistant thermoplastic polymer blend with varied thickness
- Impact Management: Six-piece EPS liner using five densities for targeted impact absorption
- Rotational Impact Management: Low-friction coating and polished EPS surfaces help reduce rotational acceleration
- Ventilation: Ten intake vents and seven exhaust ports
- Fit System: Adjustable crown and cheek pads with removable cheek pads
- Safety System: Emergency Release System and visor release system
- Retention: 1-inch soft textile chin strap with stainless steel D-rings
- Hydration Support: Integrated hydration tube channels in the cheek pads
- Comfort Liner: Recycled-material construction