Alpinestars · Protection · Adventure / Street
The Alpinestars Nucleon Plasma Back Protector Insert is a ventilated back protector insert designed for Adventure and Street riding. Built around Alpinestars’ Nucleon Plasma Technology, it’s made to balance impact force absorption with flexibility for a comfortable, body-following feel.
Its design lets the protector compress and extend on itself to help it conform across a range of rider shapes, while a soft-touch textile coating and inner liner aim to keep comfort high on the skin side during longer rides. It is CE and UKCA-certified and meets Category II EN1621-2:2014 Level 2.
This insert uses Alpinestars’ Nucleon Plasma Technology, developed through extensive testing and research. The material is described as eco-friendly, sustainable, and lightweight, engineered to balance impact force absorption with density, thickness, and pliability. The goal is a protector that feels flexible on the bike while still providing structured back coverage.
An innovative construction allows the Nucleon Plasma Back Protector Insert to compress and extend on itself. This self-adjusting behavior is intended to create an ultra-adaptive fit that moves with the rider and supports comfort during active riding positions. It is developed in three waist-to-shoulder dimensions to help cover a wide range of body sizes.
For riders who value airflow, the insert is described as highly ventilated for strong airflow and breathability. On the body-facing side, it adds a soft-touch inner liner and a soft-touch textile coating designed to improve comfort against the skin and help keep the protector feeling smooth during extended wear.
| Highly ventilated for superior airflow and breathability, with a soft-touch inner liner on the skin side for optimum rider comfort. |
| Developed in three waist-to-shoulder dimensions to cover all body sizes. |
| 60 years of innovation and extensive testing and research have resulted in Plasma Technology; the perfect balance between impact force absorption, density, thickness and pliability. |
| The Nucleon Plasma Back Protector Insert’s innovative design allows the protector to compress and extend on itself which delivers an ultra-adaptive fit for superior rider comfort. |
| Category II EN1621-2:2014 Level 2. |
As listed by Alpinestars for this protection.
