XIIIG (aka “13G”) is a modular multisport system of functionally superior thermoregulation: Apparel, wetsuits & advanced innovations. For performance & lifestyle, XIIIG is premium, technical & inspired by U.S. Military layering. XIIIG gets its namesake from the 13th Roman Legion from Gemina that crossed the Rubicon in 49 B.C. Like ad meliora means onto better things