Alpinestars Nucleon Plasma Divided Chest Protector Insert. Innovative Plasma M design features extensive perforations throughout to deliver maximum airflow and heat dissipation. Soft tactile backing guarantees structural integrity of the protector by preventing any potential tearing. Compatible with all Alpinestars garments, current and previous. USDA certified bio-based eco-friendly and sustainable impact absorbing material. Ultra-comfortable due to the soft and flexible Plasma viscoelastic compound, light weight and low profile, and best in class breathability. Impact performance exceeds the minimum CE certification requirements.