Check the listing for details. Alpinestars Nucleon Plasma Racing Chest Protector Insert Red/Black. Color: Red/Black, Condition: New with tags. Suitable for MX/Off-Road. Listed at 69.95 USD. The Nucleon Plasma Racing Chest Protector Insert is designed for performance road riding and racing, offering lightweight, breathable, and comfortable protection. Engineered specifically for Alpinestars racing suits, this CE Level 1 certified insert features a composite construction with a semi-rigid thermoplastic central zone for enhanced impact dispersion. The innovative Plasma M design maximizes airflow and heat dissipation, while extended side wings provide added rib coverage. With a soft tactile backing to prevent tearing and silicone ribbing to keep the protector securely in place, it delivers a fully adaptive fit for optimal comfort during high-intensity riding.