Large 3D mesh panels with mechanical stretch Tech-Air® Ready 450D polyfabric frame chassis Detachable hood, made with air extraction channel to provide ventilation Detachable 2L waterproof liner Stretch softshell inserts in key areas New inner construction for Nucleon protection insert upgrades and ready to accommodate the new long back protector insert Waterproof compartment External DFS lite shoulder protectors Waist adjusters Nucleon Flex Plus armor