The Alpinestars Nucleon KR-CELLi Back Protector, constructed of a polymeric material blend, features a triple segmented back shell plate which creates the perfect balance between energy absorption and force dispersion. The ergonomic design of the Nucleon KR-CELLi, in tandem with the horizontal flexion grooves, allows it to contour to the natural curve of the back to provide a fit that molds to a variety of riding positions.

Features:

• Triple segmented back shell plate constructed of a polymeric material blend
• Unique cell micro-structure designed for advanced energy absorption, adaptivity, maximum breathability and air flow
• Ergonomic protection plate contours to the natural curve of the back
• Horizontal flexion groves for an adaptive fit in different riding position
• Airmesh on the body side of the protector offers maximum breathability
• CE Level 1 protection
• Fitment:
  • Women’s Stella Jackets:
    • 36-38 or XS-SM: Small Nucleon
    • 40-50 or MD-3XL: Medium Nucleon
  • Men’s Jacket:
    • 44-50 or XS-MD: Medium Nucleon
    • 52-64 or LG-4XL: Large Nucleon