The Alpinestars Nucleon Flex Proi Full Back Protector insert is an ultra-lightweight CE EN 1621-2:2014 Level 2 full insert and has been developed in three waist-to-shoulder dimensions in order to cover all body sizes. Made from 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, it offers superior comfort and protection. As it is a full-length protector, it is about 22% longer than regular inserts for enhanced coverage. High-performance polymeric material Cells and Nucleon Flex structures give optimised flexibility and excellent weight-saving properties. Snap button compatibility allows quick and easy use with Alpinestars suits and jackets.