sm5 action 2 helmet ece bright red blue glossy Size:M Other driver friendly details include Nappa Color:Blck Red Other driver friendly details include Nappa inserts on the neck profile The goal of the Nucleon Flex Pro is to deliver full length coverage in terms of protection like a fixed back protector does The lightweight SM5 helmet features a thermo injected shell incorporating a special polymer blend enhanced by varying degrees of thickness that is engineered to deliver the optimal combination of impact protection and light weight while the five density EPS liner ensures the correct density in the correct area for enhanced impact absorption