Designed for road riding, the Nucleon PLASMA Divided Chest Protector is an Alpinestars motorcycle chest insert providing low‑profile, integrated impact protection. EN 1621‑3:2018 Level 1 certified, it uses USDA‑certified bio‑based PLASMA viscoelastic material and an extensively perforated design for airflow, with a soft tactile liner for comfort. The divided format flexes naturally, keeps weight down, and fits all current and previous Alpinestars jackets for breathable, everyday protection.