The ST System uses the minimalist Solo Harness, which is a continuous-weave, "no-frills" tech webbing setup with fixed D-rings and no quick-release buckles. It is streamlined, highly durable, and favored by divers wanting a traditional technical feel. The ST Elite upgrades to the Elite 2 Harness, which features ergonomic shoulder padding, adjustable positioning, and quick-release buckles. It provides a plush, familiar fit closer to a traditional recreational jacket BCD while keeping the stability of a backplate.

No. The ST wing features an integrated stability plate and built-in cam band slots designed to mount directly to a single cylinder securely without requiring a heavy metal single tank adapter, helping keep travel weight down.

Yes. Because the system is built around a modular backplate (either aluminum or stainless steel) and standard 11-inch spacing bolt holes, you can easily swap out the single-tank ST wing for a double-cylinder wing (such as the DT50) and add dual cylinder bands whenever you are ready to transition into technical doubles diving.

Because it relies on a continuous-weave design without quick-release shoulder buckles, getting into and out of the regular ST system takes a little more practice than a traditional jacket BCD. However, once you adjust the webbing and D-ring placements to fit your body and primary exposure suit, it provides a custom, rock-solid fit that will not shift or sag underwater.