Nucleon Plasma Back Protector InsertFeatures Alpinestars' Nucleon Plasma TechnologyEco-friendly, sustainable and lightweight impact absorbing material, while its design delivers adaptability, breathability, and ventilationBacked with a soft-touch textile coating, this adaptive protector delivers force dispersion, flexibility, and comfortEco-friendly and sustainable impact absorbing material; a blend of bio-based materials and high performance polyurethane delivers adaptability for an enhanced performance fitVentilated for airflow and breathability, with a soft-touch inner liner on the skin side for rider comfortFeatures a number of lateral and longitudinal ventilation channels for effective heat dissipationDesign allows the protector to compress and extend on itself which delivers an adaptive fit for rider comfort