Alpinestars Nucleon Plasma Racing Chest Protector Insert. Specifically engineered for use with all Alpinestars racing suits. The Level 1 CE certified chest protector insert is a composite construction and has a central semi-rigid thermoplastic zone on a Nucleon Plasma chest protector for greater impact force dispersion in a critical area. The innovative Plasma M design delivers maximum airflow and heat dissipation. The soft tactile backing guarantees structural integrity of the protector by preventing any potential tearing. Extended side wings for greater coverage of the ribs. Silicone ribbing on inner side to prevent slipping and ensure the protector remains in place. USDA certified bio-based eco-friendly and sustainable impact absorbing material. Impact performance exceeds the minimum CE certification requirements. Fully adaptive design for maximum comfort.