The extremely lightweight Level 2 CE and UKCA certified Nucleon Flex Proi Full Back Protector Insert features a highly ventilated hybrid of Nucleon Cell and Nucleon Flex protectors for the optimum balance of force dispersion and flexibility, with a soft-touch 3D mesh liner for enhanced rider comfort.The back protector insert is a full-length back protector, about 22% longer than regular back protector inserts. The Nucleon Flex Proi is compatible with all Alpinestars' sport and touring jackets that have released since Spring 2022, as all jackets have a double pocket to insert either a regular or longer back protector insert. The goal of the Nucleon Flex Proi is to deliver full-length coverage in terms of protection, like a fixed back protector does, but with the practicality of an insert.

Key Features
• The super lightweight back protector insert is developed in three waist-to-shoulder dimensions in order to cover all body sizes.
• High performance polymeric material Cell and Nucleon Flex structures for optimized flexibility and excellent weight saving properties.
• The back protector's design changes from the center towards the outside providing the perfect balance between energy absorption and flexibility.
• Soft comfortable 3D mesh on the body side of the protector offers breathability and rider comfort.
• Snap button compatibility for quick and easy use with Alpinestars suits and jackets.
• Rigorously tested and certified to for proven performance in extreme temperatures.
• Back Protector: EN 1621-2:2014 Level 2 (T+ & T-).