Highly flexible and breathable, the Alpinestars Nucleon KR-3 Back Protector is engineered for maximum performance. Using hard shell backed with a soft viscoelastic PU foam compound, the KR3 achieves both max comfort and extraordinary impact absorption. 

Features:

• 3 waist-to-shoulder dimensions in order to cover all body sizes
• Lattice-structured back shell plate constructed from a high performance polymeric material blend for optimized flexibility and excellent weight-saving properties
• Soft viscoelastic PU foam compound
• Ergonomic design design to absorb high impacts and allow maximum breathability and air flow
• Nucleon PU foam on the central spine for extraordinary impact absorption performance
• Convex central hard shell provides highest protection for the spine
• Horizontal flex grooves for adaptive fit in all riding positions
• Adjustable rib protector constructed of high performance polymeric material blend for additional side protection
• Shoulder blade protective padding extensions protect the acromion bone
• Waist adjustment for customized fit
• Slim vented kidney belt for added position stability and security
• Adjustable, detachable elastic shoulder straps
• Compatible with the Alpinestars Nucleon KR-C Chest Protectors (sold separately)
• Compatible with the Alpinestars Nucleon KR-TB Protector (sold separately)
• CE certified to EN 1621-2:2014 Level 2