Alpinestars - Nucleon KR-3 Back Protector

Developed in three waist-to-shoulder dimensions in order to cover all body sizes, Lattice structure back shell plate is constructed from a high-performance polymeric material blend for optimized flexibility and excellent weight-saving properties combined with soft viscoelastic PU (polyurethane) foam compound construction, Single injected lattice structure shell with an ergonomic design to absorb impacts and allow maximum breathability and airflow, Nucleon PU foam on the central spine area for additional impact absorption performance, Additional convex design on the central hard shell provides the highest level of protection for the spinal area, Horizontal flex grooves for an adaptive fit in all riding positions, Adjustable rib protector made with high-performance polymeric material blend for additional side protection, Shoulder blade protective padding extensions to guard the acromion bones, Waist adjustment for a customized fit, Slim, vented kidney belt for added position stability and a custom fit, Adjustable, detachable elastic shoulder straps via snap-fit system for a comfortable fit, Compatible with the Nucleon KR-C and Nucleon KR-TB protectors