From the patent of the first union suit in 1868, the one-piece thermal layer has been known for warmth, comfort and freedom of movement. While that part hasn’t changed, upgrades in design and materials, like the thick plush fleece of our Expedition Weight Union Suit bring a modern, high-performance take on a classic. High-stretch poly/spandex fleece delivers outstanding warmth and breathability.

OS Systems offers two waterproof/breathable models, the ful featured SPLB-SROB, and the economy SPLB-SRBEC, in 19 standard sizes, plus full custom sizing. In addition, OS can individually design and make your drysuit with the features you choose.

OS Systems offers two waterproof/non-breathable models, the tough and durable SPLB-SRO, and the economy SPLB-SREC, in 19 standard sizes, plus full custom sizing. In addition, OS can individually design and make your drysuit with the features you choose. Except where specified, all OS waterproof non-breathable SARR Surcace Water Drysuits include (1) Material on SPLB-SREC: 200 denier oxford with a polyeurethane coating for waterproofing. (2) Color for SPLB-SREC: Orange top / Black bottom.