The NUCLEON KR-2i soft back protector insert is certified Level 2 to the latest back protector standard (EN1621-2:2014). Extremely lightweight, flexible & ergonomically profiled for an optimized anatomical fit the NUCLEON KR-2i incorporates an airflow system for cooling & comfort. The highly protective NUCLEON KR-2i back protector is quick & convenient to insert & fits perfectly in a rider’s jacket or suit for the ultimate in safety performance. Lightweight, flexible PU injected impact foam. Contoured for anatomical & adaptive fit. Perforated for breathability & comfort. Channel ventilation system for optimized airflow.