Alpinestars Nucleon Flex Pro Insert (144-167) - Red

A full-length Level 2 back protector insert that gives coverage closer to a fixed back protector while still slipping into a jacket pocket. It's about 22% longer than a regular insert, blending Nucleon Cell and Nucleon Flex structures with a soft 3D mesh liner.

Key features

• Full-length coverage: Around 22% longer than regular back protector inserts.
• Hybrid construction: A solid Cell core framed by a more flexible 3D Cell structure, with a Nucleon Flex layer over the central back.
• Level 2, hot and cold: Certified Level 2 to EN 1621-2:2014, including T+ and T- testing.
• Breathable liner: Soft-touch 3D mesh on the body side for airflow and comfort.
• Graded design: The structure changes from the centre outwards to balance energy absorption and flexibility.
• Wide compatibility: Fits Alpinestars sport and touring jackets released since Spring 2022, which have a double pocket for regular or longer inserts.

Specifications

• Certification: CE and UKCA, EN 1621-2:2014 Level 2 (T+ & T-)
• Type: Full-length back protector insert
• Construction: Nucleon Cell and Nucleon Flex hybrid, polymeric blend
• Lining: 3D mesh
• Fits: Alpinestars sport and touring jackets released since Spring 2022
• Size: 144-167 (one of three waist-to-shoulder dimensions)
• Brand: Alpinestars
• Category: Armour & Protection
• Riding style: Road
• Fit: Unisex
• Colour: Red

Who it's for

Riders with a recent Alpinestars sport or touring jacket who want longer, Level 2 back coverage without switching to a strap-on protector.