Alpinestars A-4 Plasma Roost Deflector – Lightweight Motocross Chest & Back Protector Designed for serious off-road riders, the Alpinestars A-4 Plasma Roost Deflector delivers advanced impact protection, lightweight comfort, and maximum ventilation—helping you ride harder with confidence. Whether you're tackling motocross tracks, enduro terrain, or technical trails, this roost deflector enhances safety while maintaining the mobility needed to control your powersports vehicle. The A-4 Plasma combines a semi-rigid thermoplastic chest protector with a flexible Nucleon Plasma back protector, creating a hybrid protection system that’s both durable and adaptive.
