Skip to product information
A-4 Plasma Chest Protector
£149.99
Built for motocross and off-road riding, the A-4 Plasma Chest Protector provides lightweight chest and back impact protection, with ventilated construction and an adaptive Nucleon PLASMA back protector supporting airflow and freedom of movement on the bike.
Due to regulations for transport of dangerous goods by air (IATA) and road (ADR), consumers are not permitted to ship Tech-Air® products themselves for return or servicing. In the event of a return or service request you must therefore deliver the goods in person to one of our Tech-Air® Hubs. Please ensure you first contact our Customer Care team to receive confirmation of the correct Hub and approval before visiting.
Tech-Air® Hubs are currently available in select countries. Additional locations across Europe will be launched soon.
Please use the map below to find your closest Tech-Air® Hub.
By purchasing a Tech-Air® product on the Alpinestars website, you acknowledge and accept this return policy. If you still decide to ship your Tech-Air® product as a return, Alpinestars Spa will not be held responsible for the transit of such goods and will not accept them as returns. For this reason, no refund will be issued.
For any questions, feel free to contact our Customer Care team before making your purchase.
Free shipping above £90
Free 30 day returns
A-4 Plasma Chest Protector
£149.99
Technical Specifications
Style
CE Certification
Technologies
Nucleon PLASMA®
Main Material
Protection
Top Categories
Frequently asked questions Hide FAQs
Is the A-4 Plasma Chest Protector CE-certified?
Yes, this chest protector meets CE certification standards for impact protection. The semi-rigid thermoplastic polyhedron chest plate and Nucleon PLASMA back protector are engineered to provide certified protection for off-road and motocross riding.
Does this chest protector include back protection?
Yes, the A-4 PLASMA includes integrated Nucleon PLASMA back protection. This provides comprehensive front and back coverage in a single, anatomically profiled unit designed specifically for off-road riding.
How does the A-4 Plasma fit under a jersey or jacket?
The A-4 PLASMA features an anatomically profiled, low-profile design that fits comfortably under motocross jerseys and off-road jackets. The lightweight construction and breathable materials ensure it doesn't add excessive bulk while maintaining full protection coverage.
Can this chest protector be worn for all types of off-road riding?
Yes, the A-4 PLASMA is engineered for all forms of off-road riding including motocross, enduro, trail riding, and off-road adventure. Its adaptive design and comprehensive protection make it suitable across different off-road disciplines and riding intensities.
Is the A-4 Plasma Chest Protector breathable for hot weather riding?
Yes, the A-4 PLASMA is specifically designed with breathability in mind. The thermoplastic polyhedron structure and Nucleon PLASMA back protector allow airflow while maintaining protection, making it suitable for warm weather off-road riding conditions.