The Fourth Element Halo AR incorporates highly advanced thermal technology and one of the most insulating materials ever developed, it’s performance exceeds expectations of any diving undergarment. Using technology originally created for space exploration and cryogenics, the HALO AR features the extreme insulation material A°RGON™ aerogel in a compression resistant matrix. With phenomenal insulation properties, this material enables the Fourth Element Halo AR to achieve extreme thermal protection from a thinner, less buoyant drysuit undergarment.