The extremely lightweight, CE and UKCA Level 2 certified Nucleon Flex Pro back protector insert features a highly ventilated hybrid of Nucleon Cell and Nucleon Flex protectors for the optimal balance of force dispersion and flexibility, with a soft-touch 3D mesh lining for added comfort.

• The super-lightweight back protector insert is developed in three waist-shoulder sizes to cover all body sizes.
• Cell and Nucleon Flex structures made from high-performance polymer material for optimized flexibility and excellent weight-saving properties.
• The back protector design shifts from the center outward, providing the perfect balance of energy absorption
and flexibility.
• The soft and 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 T+&T certified for proven performance in extreme temperatures.
• Back protector: EN 1621-2:2014 Level 2 (T+ & T-).