> With 10C water you can only be down there for at most half an hour (especially not wearing a wet/dry suit) He worked up to spending as long as 2 hours in the

> With 10C water you can only be down there for at most half an hour (especially not wearing a wet/dry suit) He worked up to spending as long as 2 hours in the water on good days[0]: "[I]f I've had a bad day or I haven't slept well or I've had an injury, I go in the water and it's very difficult for me to thermoregulate. If I've had a great day, I've slept well, I'm feeling strong, I can stay in for a very long time, up to two hours. But if I'm compromised mentally, I can sometimes be cold within 20 minutes." [0] https://www.npr.org/2020/10/15/923915545/filmmaker-finds-an-unlikely-underwater-friend-in-my-octopus-teacher https://www.npr.org/2020/10/15/923915545/filmmaker-finds-an-...