Technical performance and freedom of movement combined with the Alpinestars A-4 Plasma motocross chest protector

This motocross chest protector is more than just protective gear : it's technical armor designed for riders who demand more.

With its profile designed specifically for off-road driving, it accompanies you with lightness and agility on all tracks.

Its semi-rigid thermoplastic polypropylene chest plate provides robust protection, while the Nucleon PLASMA back protector offers advanced back security without compromising comfort.

Its ventilated and ergonomic design allows maximum ventilation and exceptional freedom of movement, for a smooth and safe riding experience at all times.

FEATURES :

• Anatomically profiled for all types of off-road riding
• Includes a semi-rigid thermoplastic polyhedral design chest plate and a Nucleon Plasma back protector, both designed to be lightweight, breathable, comfortable, adaptive and protective.
• Highly flexible Nucleon Plasma back protector, made from viscoelastic materials derived from bio-based polymers, formed into a structure that is flexible in all directions, while being able to effectively dissipate impact energies.
• Lightweight and highly ventilated, this chest protector provides excellent dispersion and absorption of impact forces, while guaranteeing maximum coverage in all riding positions.
• Lightweight, ultra-ventilated chest plate.
• The external design of the chest shell provides the desired structural strength and resistance to imposed loads, outperforming flat or untextured surfaces.
• The soft, over-injected side wings of the breastplate follow the contours of the body for increased comfort and optimal freedom of movement.
• Optional Race kit – Designed to be compatible with the Nucleon Plasma Roost Coverage Extension Set, including upper and lower chest extensions, as well as a Y-strap system allowing the A-4 to be used without the back protector.
• Incorporates highly perforated, adjustable and removable rib and shoulder protectors for additional coverage against projections and impacts.

CONSTRUCTION

• Equipped with adjustable shoulder and side straps for a performance-optimized fit.
• Soft, removable thermoformed shoulder pads for increased rider comfort.
• The back protector lining 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 ribbed for superior airflow, while minimizing surface area contact with the skin.
• The perforated 3D mesh chassis provides additional protection against tire spray.
• Compatible with Bionic Neck Support (BNS) via pull tabs located on the shoulders.
• USDA certified, environmentally friendly, sustainable, bio-based impact absorption material.