halo a r socksThe HALO AR Socks are Fourth Elements warmest drysuit socks to date, combining aerospace grade insulation technology with a low bulk, high performance design for extreme cold water diving. Developed for divers who spend extended time in cold environments, the HALO AR Socks use advanced Inner Space Technology with ARGON aerogel insulation. This material, originally developed for space and cryogenic applications, delivers phenomenal insulation while