Alpinestars Back protection insert nucleon KR-celli

Nucleon KR-Cell back protector insertExtra lightweight back protector in three sizes (waist to shoulder) to fit all body typesTriple segmented back protector is made of a high performance polymer blend that optimizes flexibility and weightCenter outward design and structure ensures a perfect balance between force dispersion and energy absorptionUnique cell microstructure designed for advanced energy absorption, Ergonomically contoured skid plates follow the natural curvature of the back to ensure an optimal fit while ridingHorizontal flex grooves for adjusting to different riding positionsFlexible and comfortable ventilation mesh on the body of the skid provides more breathability and comfort for the rider