Si Tech and Apeks low-profile valves. QCS quick-change cuffs. Polar fleece liner for 10-15°C, Thinsulate for below 5°C. Inflate slightly before descent to avoid suit squeeze.
Choosing between trilaminate, neoprene, or rubber, and between brands such as Santi, Bare, Scubapro, or Waterproof, is one of the most costly decisions for a technical diver. Questions cover the position and operation of exhaust valves, maintenance with silicone or talcum powder, dry gloves, and the appropriate thermal undergarment. P-valve solutions also appear as a recurring topic.
A suit with too much internal volume introduces gas that is difficult to control during ascent, while one that is too tight compresses the thermal undergarment. Brands such as Si Tech and Apeks offer low-profile valves that reduce the risk of snagging. Modern quick-change seal systems such as the Si Tech QCS require no adhesive or tools. Thermal undergarments should be selected according to temperature: fleece for 10–15 °C and Thinsulate for water below 5 °C. It is recommended to slightly inflate the suit before descent to avoid suit squeeze.