The Alpinestars Nucleon Plasma Divided Chest Protector Insert (Red/Black colorway, 2-piece set) is a premium, low-profile armor upgrade engineered to slide directly into the internal chest pockets of all current and previous Alpinestars motorcycle riding jackets.

• Impact Rating: CE Certified Level 1 – KP (specifically meeting the EN 1621-3:2018 standard for divided impact chest armor).
• Core Material: Constructed utilizing Alpinestars’ innovative PLASMA viscoelastic compound—a USDA-certified, bio-based, eco-friendly impact absorbing material that stays highly pliable during movement but hardens dynamically upon sudden impact. 
• Composite Layering: Features a specialized central semi-rigid thermoplastic zone layered over the plasma core to offer enhanced force dispersion across vital target areas. 
• Structural Integrity: The outer perimeter is built with an anti-tear, soft-tactile backing designed to prevent premature ripping or distortion over extended use.

• PLASMA M Design: Heavily engineered with extensive structural perforations across the entire 2-piece frame to optimize continuous cooling airflow and heat dissipation.
• Flexible Ergonomics: The divided layout bends seamlessly alongside the body’s natural curvature, preventing the bulky stiffness common with traditional single-piece chest plates.
• Inner Lining: Finished with a gentle, soft-touch material on the skin side to eliminate internal friction or chafing against undergarments.