Alpinestars A-4 Plasma MTB Chest Protector

Engineered for off-road and downhill MTB riding, the Alpinestars A-4 Plasma Chest Protector combines advanced protection with exceptional comfort and breathability. Its semi-rigid thermoplastic polyhedron design and Nucleon PLASMA back protector offer lightweight, adaptive impact absorption. The flexible side wings and adjustable straps ensure a tailored fit, while the ventilated structure enhances airflow. Additional rib and shoulder padding provide extra coverage, and compatibility with the Nucleon PLASMA Extended Roost Coverage kit allows for customization.

Features:
• Semi-rigid thermoplastic polyhedron chest protector for structural strength with minimal material
• Nucleon PLASMA back protector made from bio-based viscoelastic material, pliable in all directions
• Lightweight and highly ventilated design for maximum airflow and comfort
• Over-injected flexible side wings that follow body contours for freedom of movement
• Adjustable and detachable rib and shoulder padding for added impact protection
• Removable soft tactile thermoformed shoulder pads for enhanced comfort
• Compatible with Bionic Neck Support via elasticated pull tabs
• Constructed from USDA Certified bio-based, eco-friendly impact absorbing materials
• Adjustable shoulder and side straps for a performance-optimised fit
• Perforated 3D mesh chassis offers protection against tire roost
• Optional compatibility with Nucleon PLASMA Extended Roost Coverage kit including upper and lower chest extensions and Y-Strap system
• Certified to EN 1621-2:2014 Level 1 (back protector) and EN 1621-3:2018 Level 1 (chest protector)