Alpinestars Nucleon Flex Proi Back Protector Insert - Transparent Smoke/Red Jackets while the helmet is still

while the helmet is still on the rider’s head

With a fully equipped helmet  testing  facility

plus perforation zones for improved breathability

The shell integrated four-point hinge system follows the natural movement of the knee and keeps the protector well positioned in all riding positions

Alpinestars Nucleon Flex Proi Back Protector Insert - Transparent Smoke/Red Jackets while the helmet is stillAlpinestars Nucleon Flex Proi Back Protector Insert Transparent Smoke Red 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