Alpinestars A-4 Plasma Chest Protector

Anatomically profiled for all forms 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 that are engineered to be lightweight, breathable, comfortable, adaptive and protective. Key features. Highly flexible Nucleon Plasma back protector: Constructed from viscoelastic material engineered from bio-based polymers and formed into a structure that is pliable in all directions while maintaining the ability to dissipate impact energies. Lightweight and highly ventilated, this protector offers strong impact force dispersion and absorption while ensuring maximum coverage area in all riding positions. Lightweight and ultra-vented chest armor: The chest outer shell's design is based on geodesic polyhedrons, and like a geodesic dome, less material is needed to achieve the desired structural strength and imposed load performance when compared to flat or unfaceted surfaces. This results in a protector where the whole is greater than the sum of all its parts, making the new A-4 Plasma Chest Protector supremely lightweight and ventilated. The over-injected flexible side wings of the chest protector perfectly follow the body's contours for superior comfort and freedom of movement. Optional kit: Engineered to be compatible with the Nucleon Plasma extended roost coverage kit which includes upper and lower chest extensions, and an additional Y-strap system to use the A-4 chest without the back protector. Rib and shoulder coverage: A-4 Plasma Chest Protector features highly perforated, adjustable and detachable rib and shoulder padding for additional coverage against roost and impact. Construction. Equipped with adjustable shoulder and side straps for an optimized performance fit. Removable soft tactile thermoformed shoulder padding for enhanced rider comfort.