Alpinestars Nucleon KR-Celli Back Protection Insert

Super lightweight back protector insert in three waist-to-shoulder dimensions to cover all body sizes, Triple segmented back shell plate is constructed from a high-performance polymeric material blend for optimized flexibility and excellent weight saving properties, Structural design from center towards the outside provides the perfect balance between force dispersion and energy absorption, Unique cell microstructure designed for advanced energy absorption, adaptivity, maximum breathability and air-flow, Ergonomic protection plate contours to the natural curve of the back ensuring optimum fit while riding, Horizontal flexion grooves for an adaptive fit in different riding position, Soft comfortable airmesh on the body side of the protector offers maximum breathability and rider comfort