Alpinestars Nucleon Kr Cell Back Protector 6504018-13-XS

Nucleon KR-Cell Back Protector.Developed in three waist-to-shoulder dimensions in order to cover all body size types.Back hard shell plates are constructed from a high-performance polymeric material blend for optimized flexibility and excellent weight-saving properties.Shells are highly perforated for maximum breathability and air ventilation.Single injected compound shell constructed with triple-layer design to absorb impacts and allow maximum airflow.Ergonomic protector plate contours to the natural curve of the back to ensure an optimal fit when in the riding position.Horizontal flexion grooves for an adaptive fit.Adjustable, detachable elastic shoulder straps with a snap-fit system for a comfortable fit.Compatible with the Nucleon KR-C protector.Kidney belt features dual hook-and-loop closure system.Soft bio-foam padded chassis for maximum comfort.