Alpinestars Nucleon Flex Pro Protector

Lightweight, ventilated, and ergonomically engineered for performance.
The Nucleon Flex Pro Protector is designed for riders who demand high-level impact protection, comfort, and mobility. Incorporating innovative Nucleon Flex Pro technology, it delivers lightweight, ventilated, and body-adaptive protection for both on- and off-bike use.

Construction & Materials

• Ergonomic design for high levels of movement and flexibility.

• Open structure ensures excellent airflow and ventilation, keeping the rider cool.

• Slim profile provides discreet protection while off the bike.

Protection

• CE Level 2 certified according to EN 1621-1:2012 for top-tier impact safety.

• Adaptive design molds to the rider’s body for enhanced comfort and fit.

Ergonomics & Fit

• Lightweight construction for minimal restriction during active riding.

• Ventilated design keeps the rider cool under intense conditions.

• Slim, low-profile fit integrates seamlessly with garments without adding bulk.

The Nucleon Flex Pro Protector offers professional-grade safety, ergonomic comfort, and ventilated performance — ideal for riders seeking discreet, adaptive protection without compromising mobility.