The Nucleon KR-2i soft back protector insert is ce-certified level 2 to the latest back protector standard (EN1621-1:2014) Extremely lightweight Flexible and ergonomically profiled for an optimized anatomical fit the Nucleon KR-2i incorporates an airflow system for cooling and comfort The highly protective Nucleon KR-2i back protector is quick and convenient to insert and fits unobtrusively within a riders jacket or suit for the ultimate in safety performance.