ALPINESTARS (ROAD) Nucleon Flex PROi Full Back Protector Insert — Size M, Back

🛡️ Hybrid cell-and-flex technology delivers ventilated, flexible impact protection across the full back.

• Ergonomically contoured dual-zone outer shell for improved mobility and fit.
• Advanced polymeric blend with a solid cell-structure core framed by a more flexible 3D cell architecture for superior energy absorption.
• Dedicated flex layer on the central back zone adds comfort and targeted impact dispersion.
• Expanded coverage in critical areas while remaining lightweight and highly ventilated.
• Rigorously tested and certified EN 1621-2:2014 Level 2 for proven performance, including in extreme temperatures.
• Materials composition: 70% thermoplastic elastomer, 25% polyester, 3% polyamide, 2% other.