As low as $57.49/mo with or . (Pay in 4 interest-free payments)
ALPINESTARS Youth SM3 Radium Helmet (Matte Gray/Black/Yellow Fluo) – Size S Designed for youth MX and off-road riders, the ALPINESTARS SM3 combines advanced impact engineering, race-inspired ventilation, and a secure, customizable fit. The Radium graphic in matte gray/black/yellow fluo delivers aggressive style with performance-focused protection. Key Features Thermo-injected shell with a special polymer blend and varying thickness for the ideal balance of protection and lightweight feel Lightweight, impact-resistant thermoplastic outer shell Adjustable fit using crown and cheek pads (spare parts available in different thicknesses) Multiple-density inner liner supports correct impact absorption while helping reduce overall weight Surfaces engineered to minimize effects of oblique impacts Low-friction slip plane layer on the main EPS liner to help reduce rotational acceleration forces Maximized ventilation with 10 inlets and 7 exhaust ports; visor directs airflow to ports Visor release system releases with predetermined force to help reduce neck loads during impact Comfort liner made with recycled materials for a lower carbon footprint Hydration tube channels integrated into cheek pads for convenience 25 mm soft textile chin strap for comfort and security Emergency Release System with removable cheek pads for safe removal while helmet remains on Stainless steel D-rings for a tight, secure fit Specifications Brand/Model: ALPINESTARS SM3 Type: MX (Off-Road/ATV/UTV) Gender: Unisex | Size: Small (S) Color/Finish: Matte (Black/Grey/Yellow Fluo) | Graphic: Radium Shell Material: Composite Fiberglass Vented: Yes Weight: 4.15 lbs | Dimensions: 14.25" x 10" x 11.5"
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
Lightweight outer shell constructed from a technologically advanced impact resistant thermoplastic
The fit can be tailored to the rider’s head thanks to the helmet’s crown and cheek pads, which are available as spare parts in different thicknesses
The multiple density inner liner ensures the helmet is equipped with the correct density in the correct area for enhanced impact absorption, while also helping to reduce overall weight
The inner and outer surfaces are engineered to minimize the effects of oblique impacts
Low friction coating is applied to the inner part of the main EPS liner to reduce the rotational acceleration forces that can result from certain oblique impacts— this layer essentially acts as a slip plane to mimic the brain’s own low friction cerebrospinal fluid, which is the body’s natural defense against oblique impacts
Maximized ventilation and high levels of heat transfer exchange thanks to ten inlets and seven exhaust ports
The visor has been designed to direct air into the ports for enhanced airflow
Visor release system ensures the visor is released with the correct pre-determined amount of force, effectively reducing the forces on the rider’s neck during an impact
Comfort liner is constructed using recycled materials for a lower carbon footprint
Hydration tube channels are integrated into the helmet’s cheek pads for convenience and performance
Soft textile chin strap is 25 mm for optimal safety and rider comfort
Equipped with an Emergency Release System and removable cheek pads to permit the safe and easy removal of the cheek pads while the helmet is still on, while the 3D contoured foam ensures rider comfort
Stainless steel D-rings ensure a tight and secure fit
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