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.