An ergonomically optimized insert for high-performance riding, the lightweight Nucleon KR-Cell CiS Protector incorporates an advanced microstructure cell for efficient energy absorption upon impact and high levels of airflow.

The Nucleon KR-CiS is a high-performance, super-lightweight track protector with Nucleon Cell technology.
Four buttons ensure secure engagement with the Alpinestars Slimfit jacket.
The double-layer chest shell plate is constructed from a blend of high-performance polymer materials for optimized flexibility and
excellent weight-saving properties.
The structural design of the chest protector changes from the center outward and provides the perfect balance between
force dispersion and energy absorption.
Unique cell microstructure designed for advanced energy absorption, adaptability, maximum breathability, and airflow.
The ergonomically designed protector plate conforms to the natural curve of the back, ensuring an optimal fit while riding.
Soft, comfortable air mesh on the body side of the protector provides maximum breathability and rider comfort.
(Size S = jackets XS to M / Size L = jackets L to XXL)