Alpinestars Nucleon Plasma Back Protector With Strap. Ergonomically designed for all forms of road racing. The Level 2 CE certified back protector is a composite construction and has a central semi-rigid thermoplastic zone on a Nucleon Plasma back 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.