NUCLEON KR-C CHEST PROTECTOR TECHNICAL PROTECTION The NUCLEON KR-C features a convenient and versatile divided chest protector certified to level 2 that can be quickly and easily attached to the NUCLEON KR-1 and KR-2 back protectors to provide superb all-round protective capabilities. CONSTRUCTION An innovative harness system allows the fast connection to the NUCLEON back protectors KR-1 and KR-2. Highly vented and very lightweight, the ergonomic designed protectors are excellent for touring and sportriding in combination with the KR-1 and KR-2.