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1. Compatible with all Alpinestars jackets, current and previous — a single chest insert purchase works across the full Alpinestars garment range without fitment uncertainty
2. USDA certified bio-based Nucleon Plasma viscoelastic compound provides the comfort-under-wear properties of Plasma — soft, flexible, and adaptive — alongside Level 1 CE certified impact performance
3. At £36.99, this is the most accessible Plasma technology chest insert in the range, making the material performance upgrade achievable without a significant investment
1. CE Level 1 is the lighter certification tier; riders wanting Level 2 chest insert protection should consider the Nucleon Plasma Full Chest Protector Insert or the Hook and Loop version at £54.99
2. Divided format protects the chest in two sections rather than a unified full-chest panel — adequate for most road riding applications but lower in total coverage than a full-chest insert
3. Available in two sizes only, which requires careful size matching against the Alpinestars size guide for correct fitment
Factory chest inserts in motorcycle jackets are often basic foam pads that provide regulatory compliance with minimum protection standards rather than serious impact performance. Replacing them with a Nucleon Plasma insert upgrades the protection material quality at a cost well below a replacement jacket, and the Nucleon Plasma Divided Chest Protector Insert makes that upgrade accessible at the lowest price point in the Plasma chest insert range.
The insert is divided: two separate protector panels for the left and right chest zones rather than a single unified panel. The divided format provides CE Level 1 certified coverage across the primary chest impact zones while maintaining high flexibility and the ability to move with the natural chest curvature rather than imposing a fixed profile. The protectors are designed to fit inside all Alpinestars jackets, current and previous generations, providing a universal upgrade path without fitment uncertainty.
The protection material is Nucleon PLASMA: a USDA certified bio-based, eco-friendly, and sustainable viscoelastic compound. Plasma material is soft, flexible, and comfortable against the body in normal use, conforming to the natural curves of the chest rather than presenting the rigid, hard-against-the-body feel of conventional protector materials. Under impact, the viscoelastic compound absorbs and disperses the impact energy through material deformation rather than rigid deflection, with Level 1 CE certified performance that exceeds the minimum CE requirements.
The Plasma M design delivers maximum airflow and heat dissipation through the insert: a structured M-shaped perforation and channel pattern that creates ventilation paths through the protector and prevents heat accumulation against the chest during jacket wearing. A soft tactile backing prevents tearing and maintains structural integrity.
The Nucleon Plasma Divided Chest Protector is for road and touring riders with Alpinestars jackets who want to upgrade their jacket’s chest insert to Plasma viscoelastic technology at an accessible price. The universal Alpinestars jacket compatibility and divided format make this a practical replacement for any factory chest insert in the jacket range.
– CE Level 1: EN 1621-3:2018 Level 1 (exceeds minimum CE requirements)
– Nucleon PLASMA viscoelastic compound: USDA certified bio-based
– Plasma M design for maximum airflow and heat dissipation
– Divided format: two-panel chest protection
– Compatible with all Alpinestars jackets, current and previous
– Soft tactile backing for structural integrity
– Soft tactile inner liner for comfort
– Available in two sizes
The Nucleon Plasma Divided Chest Protector at £36.99 is the most accessible Plasma upgrade for Alpinestars jacket owners: CE Level 1 certified, bio-based viscoelastic material, universal compatibility. A straightforward and worthwhile factory insert replacement.
The Nucleon Plasma Divided Chest Protector at £36.99 is the entry to Plasma technology in jacket chest protection: CE Level 1 certified, bio-based viscoelastic material, and universal Alpinestars jacket compatibility. A practical and affordable upgrade from foam-only factory chest inserts.
1. Compatible with all Alpinestars jackets, current and previous — a single chest insert purchase works across the full Alpinestars garment range without fitment uncertainty
2. USDA certified bio-based Nucleon Plasma viscoelastic compound provides the comfort-under-wear properties of Plasma — soft, flexible, and adaptive — alongside Level 1 CE certified impact performance
3. At £36.99, this is the most accessible Plasma technology chest insert in the range, making the material performance upgrade achievable without a significant investment
1. CE Level 1 is the lighter certification tier; riders wanting Level 2 chest insert protection should consider the Nucleon Plasma Full Chest Protector Insert or the Hook and Loop version at £54.99
2. Divided format protects the chest in two sections rather than a unified full-chest panel — adequate for most road riding applications but lower in total coverage than a full-chest insert
3. Available in two sizes only, which requires careful size matching against the Alpinestars size guide for correct fitment
