Key Upgrades: New shoulder cap and new Sublimated liner SP Cap: Low profile, full coverage shoulder cap Sternum: Injection molded with detailled texture Front Panel: FlexCell comfort foam with sublimated graphics Spine: MD foam with PE insert Back panel: FlexCell comfort foam with sublimated graphics Arch: Low profile arches with PE insert Bicep: Adjustable bicep with molded PE Liner: Sublimated Hydrophobic mesh