00 BY XIIIg (aka "13G") are best-in-class wetsuits built from the Yamamoto Corporation’s advanced materials via Osaka, Japan: Aka OG Optimum Technology. Aka titanium coated limestone-based rubber that is 99% water-impermeable (compared to the standard 65% provided by standard oil-derived neoprene). Game-changing warmth, lightweight flexibility & durability that’s better economically & environmentally. Like ad meliora means onto better things.