Alpinestars SX-1 Plasma Knee Protector | CE Level 2 Off-Road Knee Guards

Alpinestars SX-1 Plasma Knee Protector

Built for off-road riders who refuse to compromise, the Alpinestars SX-1 Plasma Knee Protector combines CE Level 2 certified protection with next-generation Nucleon PLASMA viscoelastic technology. The result: a knee guard that moves with your body, dissipates impact energy, and keeps you riding longer in comfort. Sold as a pair.

Key Features

• Nucleon PLASMA Protection — USDA Certified Biobased viscoelastic material delivers multi-directional pliability, a custom adaptive fit, and superior impact energy dissipation
• Dual Density Co-Injected Frame — Scooped upper and lower extensions eliminate pressure points and prevent the protector from digging into the skin
• Dual Gear System (DGS) — Integrated gear profiles in the upper and lower frames ensure smooth hinge function and promote natural knee articulation
• Ergonomic Adaptive Fit — Sculpted frames with strategically positioned rigid and flexible over-injected shells accommodate a wide range of leg sizes securely
• Patella System Protection — Full coverage of the knee cup at all degrees of extension, with a rigid outer shell to guard against handlebar strikes
• Highly Ventilated Semi-Rigid Frame — Keeps airflow moving so you stay cool on long rides
• Dual Strap Closure System — Secure, adjustable fit for maximum stability and comfort

Certification

CE certified to EN 1621-1:2012 Level 2 — the highest level of knee protection under European safety standards.

Sizing

Available in S/M, L/XL, and 2XL. Refer to the Alpinestars size guide for the best fit.