Alpinestars Nucleon Kr-3 back protector

Nucleon KR-3 Back Protector, developed in three sizes from waist to shoulder to cover all body shapes. The mesh back shell is made from a high-performance polymer blend that optimizes flexibility and weight, combined with soft viscoelastic PU (polyurethane) foam. Unique injected mesh shell with ergonomic design to absorb impacts while allowing maximum breathability and air circulation. Nucleon PU foam in the central spine area for additional shock absorption performance. The extra convex design of the central hard shell provides the highest protection for the spine area. Horizontal flex grooves for adjustments in all riding positions. Adjustable rib protector for the rider's back, made from a blend of high-performance polymer materials for additional lateral protection. Larger shoulder padding to protect the shoulder blade. Adjustable waistband for a customized fit. Slim, ventilated back strap for improved positional stability and a tailored fit. Adjustable, removable elastic straps with clip system for added comfort. Compatible with Nucleon KR-C and Nucleon KR-TB.