Alpinestars T-GP Plus R V3 Air Jacket. Manufacturer: Alpinestars. Model: T-GP Plus R V3 Air Jacket. • CE Level 2 EN1621-2:2014 Alpinestars Nucleon back protector, available as an accessory upgrade. • CE Level 1 EN1621-1:2012 Alpinestars Nucleon Flex Plus shoulder and elbow protectors.