Advanced Protection for Riding Enthusiasts The Alpinestars Nucleon KR-2i Back Protector Insert is a state-of-the-art safety accessory designed for motorcycle riders. Compatible with Alpinestars jackets equipped with insert pockets, it offers CE Level 2 impact protection, merging safety with comfort. Key Features: CE Certified Level 2 Protection: Meeting the rigorous standards of EN1621-2:2014, this motorcycle back protector insert provides reliable protection against impacts, ensuring peace of mind while riding.