The extremely lightweight Level 2 CE and UKCA certified Nucleon Plasma Back Protector Insert features Alpinestars' Nucleon Plasma Technology. Unique to Alpinestars, Plasma is an eco-friendly, sustainable and lightweight impact absorbing material, while its clever design delivers class leading levels of adaptability, breathability and ventilation. • Eco-friendly and sustainable impact absorbing material; a blend of bio-based materials and high performance polyurethane delivers superb adaptability for an enhanced performance fit. • The adoption of Nucleon Plasma Technology allows Alpinestars to tailor the geometry throughout the protector, resulting in extensive perforations while still far exceeding the impact performance requirements of the CE Standards. • The Nucleon Plasma Back Protector.