Alpinestars A-4 Plasma Chest Protector

The Alpinestars A-4 Plasma Chest Protector is purpose-built for all types of off-road riding, offering a perfect balance between protection, comfort, and ventilation. Its ergonomic design ensures a close anatomical fit that adapts to your body, allowing you to move freely whether you’re tackling motocross jumps, trail riding, or navigating technical terrain.

The chest plate features a unique polygonal shell structure made from a semi-rigid thermoplastic material. This faceted surface design allows for high structural strength while keeping weight to a minimum. The angular shapes help disperse impact energy efficiently across the surface while maximising airflow through large, strategically placed perforations. The result is a lightweight, well-ventilated chest protector that doesn’t compromise on safety.

On the back, the Nucleon Plasma Back Protector provides advanced impact absorption using a USDA Certified Biobased viscoelastic material. This eco-friendly compound is soft, flexible, and designed to conform to your body while delivering strong energy dispersion during impacts. Its multi-directional flexibility ensures a snug and secure fit in any riding position, with generous coverage across the spine and back area.

Inside, the back protector is lined with a soft-touch, ribbed textile that offers superior airflow and comfort against the skin. This lining is designed to reduce skin contact while maintaining the structural integrity of the protector over time. Adjustable straps at the shoulders and sides allow for a personalised fit, while the removable thermoformed shoulder pads provide extra comfort exactly where it’s needed.

• Exceptional Comfort and Flexibility
• Lightweight and Ultra-Ventilated protection