Alpinestars Nucleon Flex Pro Full Back Protection Insert Size:Sm high-density polyethylene that is designed

high-density polyethylene that is designed using extensive computer modeling to maintain proper mass air flow readings and calibration

2006-2019 Kawasaki VN900D Vulcan 900 Classic LT

2012-2015 Can-Am Renegade 1000

2011-2012 BMW F650GS

Alpinestars Nucleon Flex Pro Full Back Protection Insert Size:Sm high-density polyethylene that is designedHybrid technology Alpinestars Nucleon Cell and Flex technologies providing ventilation and flexibility. Ergonomically contoured dual zone outer shell. Advanced polymeric blend with a solid cell structure core framed by a more flexible 3D cell structure. Nucleon Flex technology layer on the central back zone. More protection coverage in critical area. Lightweight, ventilated and ultra comfortable technology. Rigorously tested and certified for proven