Alpinestars A-4 Plasma Chest ProtectorExpertly designed for all-terrain performance, the A-4 Plasma Chest Protector is a lightweight, anatomically profiled solution for off-road riders seeking superior impact protection. Featuring a Nucleon PLASMA back protector and a geodesic polyhedron chest shell, it delivers CE Level 1 certified safety with exceptional airflow and flexibility. The system includes adjustable side straps and removable rib and shoulder padding for a customized, Bionic Neck Support compatible fit Nucleon PLASMA Back Protector: Constructed from USDA Certified Biobased viscoelastic material, this protector offers multi-directional pliability and a contoured fit for effective impact energy dissipation.

 

 

 

Nucleon PLASMA Back Protector: Constructed from USDA Certified Biobased viscoelastic material, this protector offers multi-directional pliability and a contoured fit for effective impact energy dissipation.

Geodesic Chest Armor: Features a lightweight, ultra-ventilated outer shell inspired by geodesic polyhedrons, providing high structural strength and maximum airflow with minimal material.

Adaptive Fit: Over-injected flexible side wings follow the body's natural contours to ensure superior comfort and unrestricted freedom of movement while riding.

Extended Coverage: Includes highly perforated, adjustable, and detachable rib and shoulder padding to provide targeted protection against tire roost and impacts.

BNS Compatibility: Integrated elasticated pull tabs on the soft tactile thermoformed shoulder pads allow for seamless integration with Alpinestars Bionic Neck Supports.

 

Protection

USDA Certified Biobased Nucleon PLASMA back protector provides high-performance impact force dispersion and absorption.

Geodesic polyhedron chest shell delivers structural strength and robust protection against impacts.

CE Level 1 certified back protector: EN 1621-2:2014.

CE Level 1 certified chest protector: EN 1621-3:2018.

Perforated 3D mesh chassis and padding offer reliable defense against tire roost.

Over-injected flexible side wings ensure a secure fit for consistent protection coverage.

Adjustable and detachable rib and shoulder padding for customizable impact protection.

Bionic Neck Support (BNS) compatible via integrated elasticated pull tabs.

 

Construction

According to European statutory law, the CE mark is a conformity requirement for the marketing of this product. The following standards apply:

Back protector: EN 1621-2:2014 LEVEL 1

 

Chest protector: EN 1621-3:2018 LEVEL 1