Only arms and legs are regularly moved out of the water.
Open cell wetsuit temperature guide.
These are general temperature guidelines.
While swimming you are under water with the main part of your body.
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.
For cold air temperatures more wind an activity with less movement or if you get cold easily consider a thicker wetsuit.
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 against your skin minimizes water passage inside the suit keeping you from getting colder for a longer amount of time.
Thus water temperature is decisive.
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.
Triathlon open water swimming wetsuit temperature guide chart.
This is when cardiac arrest usually occurs.
Unlike open cell foam i e a sponge water won t saturate neoprene but the gas bubbles tend to give the material a lot of inherent buoyancy.
Mako open cell wetsuit.
Even before that moment muscles get weak you lose coordination and strength.
Open cell refers to naked neoprene.
However you always move just below or slightly above the water surface.