Alpinestars A-4 Plasma Chest Protector - black/red/white

Anatomically contoured for all types of off-road riding, the A-4 PLASMA chest protector features a semi-rigid thermoplastic polyhedron-design chest protector and a Nucleon PLASMA back protector, engineered to be lightweight, breathable, comfortable, adaptable, and protective.

Features of the Alpinestars A-4 Plasma Chest Protector

Key Features

• Exceptional comfort and flexibility: The Nucleon PLASMA back protector is made from a USDA-certified bio-based viscoelastic material. Designed for multidirectional flexibility, the protector conforms to the body to ensure a snug fit and effectively distribute impact energy to provide reliable protection. Lightweight and highly ventilated, this protector offers strong impact force distribution and absorption while ensuring maximum coverage in all riding positions. 

• Lightweight and ultra-ventilated chest protection: The design of the outer chest shell is based on geodesic polyhedrons, and just like a geodesic dome, less material is required to achieve the desired structural strength and load-bearing capacity compared to flat or unfaceted 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 overmolded flexible side wings of the chest protector perfectly follow the contours of the body for superior comfort and freedom of movement.

• Rib and Shoulder Protection: The A-4 PLASMA chest protector features highly perforated, adjustable, and removable rib and shoulder pads for additional protection against debris and impact.

• BNS-compatible via the elastic BNS pull tabs located on the removable, soft, tactile, thermal-formed shoulder pads.

Construction

• Made from certified bio-based, eco-friendly, and sustainable impact-absorbing material.

• Equipped with adjustable shoulder and side straps for an optimized fit.

• Removable soft, tactile, thermoformed shoulder padding for improved riding comfort.

• The back protector’s lining offers a soft, tactile feel against the skin while maintaining the protector’s integral structure and reducing the risk of material tears.

• The lining is ribbed for superior air circulation while reducing the amount of material in contact with the skin.

• The perforated 3D mesh chassis provides additional protection against tire debris.

• Bionic Neck Support compatibility via the BNS shoulder tabs.

Certification

• According to European law, the CE marking is a conformity requirement for the marketing of this product. 

• Back protector: EN 1621-2:2014 LEVEL 1

• Chest protector: EN 1621-3:2018 LEVEL 1