Hitena™ Reinforced Rock Tex™. The Atomic 5.0, motorcycling's most versatile and popular jacket represents a fusion of elements that combine to create a nucleus of protection, comfort, and versatility. Features Combined Waterproof treated Rock Tex™ and Hitena™ outer shell for maximum impact resistance Externally accessible C.E. approved armor in shoulders & elbows Removable Spine Armor with Pocket for Optional C.E. Spine Protector Variable Flow™ ventilation system with waterproof zippers Cross Linked Ventilation™ with Wind Tunnel Cooling Patent Pending Full Flex™ articulated back expansion panels Comfort neoprene cuff design 6 point Sure Fit™ custom adjustment system 2 outside pockets, 1 internal chest pocket Large padded lower back storage pocket 8" zipper plus 2 belt loops for jacket to pant attachment Removable insulated full sleeve liner with internal pocket 360˚ Reflective panels & logos Sizing