ALPINESTARS Chest protector set Nucleon Plasma S

This dual chest protector from Alpinestars is designed as an optional insert for motorcycle jackets. The PLASMA construction combines low weight with effective impact protection and is specifically developed to fit all Alpinestars motorcycle jackets.

The PLASMA material is a bio‑based compound made from USDA‑certified raw materials. In simple terms, it makes the protector more environmentally friendly than traditional foam types without sacrificing protective performance. The viscoelastic composition remains flexible (over time) and follows your body movements, which naturally benefits comfort. Extensive perforations across the entire surface ensure airflow and heat dissipation.

The rear face has a soft, tactile finish that preserves structural integrity and helps prevent tearing. A soft inner lining further enhances comfort. The dual, two‑piece design conforms better to your chest than a single, full‑width protector.

This Level 1 CE‑certified dual chest protector meets EN 1621‑3:2018 and offers impact absorption that exceeds the minimum certification requirements. It is available in two sizes and is very light, keeping the profile low. The Nucleon PLASMA chest protector is compatible with both current and earlier models of Alpinestars motorcycle jackets.