-From BPL Thermoregulation article.
Convective heat loss occurs in response to movement of a fluid or gas. In outdoor clothing systems, convective heat loss occurs when warm air next to the body and in the clothing is displaced by cool air from the outside environment. The biggest factor contributing to convective heat loss, of course, is wind.
In addition to wind-induced or “forced” convection, “passive” convection occurs via the “chimney effect” that draws cool, dense air into our clothing system from pants cuffs and waist hems, displacing warm, light air that exits out of our neck hems and other vents.
If I understand correctly, I think if you have an airight suit you could prevent convective heat loss completely. Air inside will be heated by body but since it cant be displaced it will form an insulative layer. Body heat will turn sweat into vapour but since it is air tight it and warm inside it will condense and give out energy. Anything wrong with my logic?
SUL air tight suit? cuben fiber with stretchy neoprene cuffs, hems, and neck collar.