Alpinestars A-4 Plasma Roost Guard — M/L

🛡️ The A-4 Plasma Roost Guard is anatomically profiled for all forms of off-road riding, delivering comprehensive protection without sacrificing mobility.

Features a semi-rigid thermoplastic polyhedron chest protector and a Nucleon Plasma back protector engineered to be lightweight, breathable, comfortable, adaptive, and protective.

• Highly flexible Nucleon Plasma back protector constructed from viscoelastic material engineered from biobased polymers to dissipate impact energy.
• Lightweight, highly ventilated construction for strong impact dispersion and absorption across riding positions.
• Ultra-vented chest armor with over-injected flexible side wings that follow the body's contours for comfort and freedom of movement.
• Optional Race Kit compatibility adds upper and lower chest extensions and an additional Y-strap system when needed.
• Perforated, adjustable, and detachable rib and shoulder padding for added coverage against roost and impact.

Removable thermoformed shoulder padding and a ribbed lining improve comfort and airflow while preserving structural integrity.

Back protector certified to EN 1621-2:2014 Level 1; chest protector certified to EN 1621-3:2018 Level 1.