MoistureCool 3D stretch mesh with air channels

Lateral side vent for added airflow

Perforated

Variable Lens System™ (VLS) replacement lens

Built in Rear Reflector

Alpinestars - Nucleon Flex Protection Vest K-Type-Horns MoistureCool 3D stretch mesh withThe extremely lightweight Level 2 CE and UKCA Nucleon Flex Pro Protection Vest features a highly ventilated hybrid of Nucleon Cell and Nucleon Flex protectors for the optimum balance of force dispersion and flexibility, and a Nucleon Flex Pro divided chest protector, with a soft touch perforated mesh chassis for enhanced rider comfort. The back protector provides full length protection coverage, and has an ergonomically contoured dual zone outer shell