Anatomically profiled for all forms of off-road riding, the A-4 PLASMA Chest Protector features a semi-rigid thermoplastic polyhedron design and a Nucleon PLASMA back protector designed to be lightweight, breathable, comfortable, adaptive, and protective.

Exceptional Comfort and Flexibility: The Nucleon PLASMA Back Protector is constructed from USDA Biobased certified viscoelastic material. Designed for multi-directional flexibility, the protector molds to the body for a snug fit, effectively dissipating impact energy to provide reliable protection. Lightweight and highly ventilated, this protector offers strong impact dispersion and absorption, ensuring maximum coverage in all riding positions.
Lightweight, Ultra-Ventilated Chest Armor: The outer chest design is based on geodesic polyhedra, and like a geodesic dome, less material is needed to achieve the desired structural strength and load-bearing performance than flat or non-faceted surfaces. This results in a protector where the whole is greater than the sum of its parts, making the new A-4 PLASMA Chest Protector extremely lightweight and ventilated.
Premium Comfort: The chest protector's flexible, over-injected side wings perfectly follow the contours of the body for superior comfort and freedom of movement.
Optional Race Kit: Designed to be compatible with the Nucleon PLASMA Extended Coverage Kit, which includes Upper and Lower Chest Extensions and an additional Y-Strap System, allowing riders to use the A-4 Chest Protector without the back protector.
Rib and Shoulder Coverage: The A-4 PLASMA Chest Protector features highly perforated, adjustable, and removable rib and shoulder padding for additional coverage against roost and impacts.
Compatible with BNS via the BNS stretch tabs located on the removable soft thermoformed shoulder pads.
Constructed with certified Biobased impact-absorbent material, eco-friendly and sustainable.
Equipped with adjustable shoulder and side straps for an optimized fit.
Removable soft thermoformed shoulder padding for improved rider comfort.
The lining on the back protector provides a soft feel against the skin while maintaining the integral structure of the protectors and reducing the risk of material tearing.
The lining is grooved for superior airflow while also reducing the amount of material in contact with the skin.
The perforated 3D mesh chassis also offers additional protection against tire roost.
Compatible with the Bionic Neck Support via the BNS shoulder pull tabs.
According to European statutory law, the CE marking 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