If you side sleep, I don't think you'll run into too much trouble. To be sure, lay on your side and ask someone to check your spine is straight. Your hips should sink in a bit, but not too much.
Else, if you are a back or tummy sleeper and it's squishy, you should try to switch to something more firm.
If what I suggested is too radical, try natural latex, which is quite firm.
A good entry point to the (pretty lacking) sleep ergonomics literature is:
Re:Making an emperor bed
by owenversteeg on Friday July 20, 2018 @07:16PM
(#17579761)
I actually sleep on my back. Not that I don't believe you, but why should I try something firmer when I find this mattress to be very comfortable and never feel back pain? I assume that this causes a risk of future back pain - would you have any information about that specifically?
Thanks a ton!
And yes, boats are generally more humid than most homes - especially when left alone, they get extremely humid.
And yes, I am Dutch, I guess you could tell by my username :) I'll have to check out a Hastens sometime.