When you put on a wetsuit your 98 6 degree body temperature warms the gas bubbles in the neoprene which act as insulation.
Open cell wetsuit temperature guide.
Even before that moment muscles get weak you lose coordination and strength.
Generally a person can survive in water at that temperatures for 10 to 20 minutes.
Triathlon open water swimming wetsuit temperature guide chart.
For cold air temperatures more wind an activity with less movement or if you get cold easily consider a thicker wetsuit.
However you always move just below or slightly above the water surface.
Lining on the outside makes the suit more durable against scratches.
This is how long it would take for the body temperature to drop down to between 70 and 80 degrees f 21 27 degrees c.
Open cell against your skin minimizes water passage inside the suit keeping you from getting colder for a longer amount of time.
While swimming you are under water with the main part of your body.
The heat retention effect of open cell neoprene is so extreme that a good fitting 5mm open cell wetsuit will keep a diver warm for 40 50 minutes in ice water 0c temperature.
Thus water temperature is decisive.
Only arms and legs are regularly moved out of the water.
Many brands will provide their own temperature recommendations that may differ slightly from those listed above.
Mako open cell wetsuit.
This wetsuit is the most popular for spearfishers and recreational freedivers.
Open cell refers to naked neoprene.