Alpinestars Nucleon KR-3 Back Protector — S, Black

The Nucleon KR-3 back protector pairs a single-injected lattice shell with viscoelastic polyurethane foam to provide high-level spinal protection while remaining lightweight and highly breathable.

• Developed in three waist-to-shoulder dimensions to cover a wide range of body sizes
• Lattice-structure back shell plate constructed from a high-performance polymeric blend for optimized flexibility and weight savings
• Single injected lattice shell with an ergonomic design to absorb impacts and promote maximum airflow
• Nucleon PU foam along the central spine area for additional impact absorption performance
• Convex central hard shell for the highest level of spinal protection
• Horizontal flex grooves for an adaptive fit in all riding positions
• Adjustable rib protector made from high-performance polymeric material for added side protection
• Shoulder blade padding extensions to guard the acromion bones
• Waist adjustment and a slim, vented kidney belt for position stability and a custom fit
• Adjustable, detachable elastic shoulder straps with a snap-fit system for comfort and easy removal
• Compatible with Nucleon KR-C and Nucleon KR-TB protectors; certified to EN 1621-2:2014 Level 2
• Material composition: 52% polyurethane, 33% TPU, 7% polyester, 5% nylon and 3% other

Designed for riders who demand both mobility and protection, the KR-3 balances superior impact performance with ventilation and an ergonomic fit.