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Nucleon Plasma Back Protector Insert
Nucleon Plasma Full Back Protector Insert
Nucleon Plasma Full Chest Protector Hook and Loop
Nucleon Kr-Celli Back Protection Insert
Nucleon KR-1 Cell i Back Protector
Nucleon Flex Proi Full Back Protector Insert
FAQs
J14 identifies a compatibility group for Alpinestars armor inserts. This collection gathers CE‑certified back and chest protectors sized to fit garments that reference the J14 compatibility code. To confirm fit, check your garment’s product page or inner label for armor pocket notes, then match the insert type (back or divided chest) and size to your garment size. If uncertain, measure the pocket height/width and compare to the insert dimensions listed on its product page.
Many recent Alpinestars sport and touring jackets provide a dual‑position back protector pocket that accepts a standard‑length insert or a longer full‑length insert for extended coverage. Choose the option your pocket supports and that sits flat without gapping.
Use the standard‑length insert when you want the lightest feel and your jacket specifies a single/standard pocket. Select a full‑length insert when your garment states it accepts a longer insert (often noted as a dual or extended pocket) and you prefer maximum spinal coverage.
Size the insert to the garment: the top should sit between the shoulder blades and the lower edge should cover the lumbar area without pushing into the seat when riding. If you’re between sizes, prioritize a secure, flat fit inside the pocket over absolute length.
Back inserts are typically certified to EN 1621‑2 and chest inserts to EN 1621‑3. Both standards define two performance levels; Level 2 provides higher impact attenuation than Level 1.
| CE Level | Impact attenuation | Typical use |
|---|---|---|
| Level 1 | Baseline protection; lower thickness/weight. | Urban/commuting, hot‑weather flexibility. |
| Level 2 | Higher impact reduction; often larger/stiffer. | Sport, touring, higher‑speed or long‑distance riding. |
Choose the level that matches your riding speeds, conditions, and comfort needs across the collection.
Only if the garment is clearly marked Tech‑Air® Compatible/Ready and the product notes allow it. Airbag garments allocate volume for deployment; depending on the model, you may be instructed to remove certain back or chest inserts when the airbag is installed. Always follow the garment and system guidance.
Explore current Tech‑Air systems and verify fit using the Tech‑Air compatibility checker before finalizing your setup.
Insert the protector into the dedicated pocket with the orientation label/arrow facing up and the smooth side toward the body as indicated. Ensure the insert sits flat, covers the target area, and does not deform the shell or restrict movement.
For care, remove all armor before washing the garment. Clean inserts separately with a damp cloth and mild soap only; do not machine‑wash, wring, or apply high heat. Wash the jacket according to its care label, then reinsert armor once completely dry. To browse alternatives or upgrades, see our protectors collection.
