This is when cardiac arrest usually occurs.
Open cell wetsuit temperature guide.
While swimming you are under water with the main part of your body.
Open cell against your skin minimizes water passage inside the suit keeping you from getting colder for a longer amount of time.
Only arms and legs are regularly moved out of the water.
These are general temperature guidelines.
Many brands will provide their own temperature recommendations that may differ slightly from those listed above.
Generally a person can survive in water at that temperatures for 10 to 20 minutes.
Open cell refers to naked neoprene.
Mako open cell wetsuit.
Triathlon open water swimming wetsuit temperature guide chart.
However you always move just below or slightly above the water surface.
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.
For cold air temperatures more wind an activity with less movement or if you get cold easily consider a thicker wetsuit.
This wetsuit is the most popular for spearfishers and recreational freedivers.
Lining on the outside makes the suit more durable against scratches.
Even before that moment muscles get weak you lose coordination and strength.