50 mm squares seems big - I reckon that would not be very comfy.
When it comes to nets I like having them with large enough holes to put my bare toes and fingers into when needed. Again a good reason to avoid smooth nets with smaller holes. I like holes big enough for the thumb and no more. There have been a few times when I have been setting up a kite in wavey conditions I have gone full "cat with claws out" mode and held on whilst the boat wiggled about. There is no way I would ever have nets I can't grab with all of my appendages (I always sail bare foot), my cat is really clear of
deck gear - super simple but eminently usable.
Also I like having nets rugged enough to tie kites and screechers down on. So again tough old cod end wins for me. Plus my cod end nets are 23 years old and still going strong. I had a
trimaran for 8 years and had 3 different nets. My
current cat has black nets. Being black seems to be very good at resisting UV.