Brooks Exhilarate-BL (Blueline) model - Collab with HP 3-D Printing. Limited. Brand New in box. Introducing the Exhilarate-BL running shoe which features “3DNA,” a 3D-printed midsole technology designed and manufactured by HP that aims to deliver a bouncy feel that propels the wearer forward with ease. Engineered and tuned specifically to groups of sizes based on runner data.