BAlpinestars Nucleon Back Protector Insert LARGE 6501615-10-L ReviewbP PP Alpinestars Nucleon Back Protector Insert LARGE 6501615-10-L PLightweight, flexible PU-injected impact foamPCheck sizing chart below before orderingPPerforated for breathability and comfortPCE-certified Level 2 (EN1621-2:2014)PChannel ventilation system for optimized airflowP