Alpinestars Nucleon KR-Ci Chest Inserts Black

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The NUCLEON KR-Ci Chest Insert Protectors are designed to fit in the integrated chest armor pockets in Alpinestars Men's Race Suits and Riding Jackets. They replace the foam padding found in the pockets with a CE Certified protector to enhanced the level of safety and performance. They are very lightweight, ventilated (very little affect to the airflow if you race suit or jacket is perforated) and constructed of a material that becomes more comfortable as it warms with wear. This is an excellent addition to any Alpinestars Suit or Jacket if protection is important to you as a motorcycle rider.


  • CE Certified to prEN 1621-3:2013
  • Highly ventilated and very lightweight.
  • Ergonomically designed protector is excellent for everyday riding.
  • Size X-Small/Small is designed to fit Euro Sizes 42-48 and International Sizes X-Small - Small(applies to both jackets and race suits)
  • Size Medium/Large/X-Large is designed to fit Euro Sizes 50-64 and International Sizes Medium - XXXX-Large(applies to both jackets and race suits)

Alpinestars Nucleon Chest Protector Size Chart

Alpinestars Nucleon Chest Protector Size Chart