Is cotton rope (8mm) good enough for partial/full hanging?

[xjxj]

I'm thinking of doing partial with 8mm thick cotton rope but i heard 12mm polyester rope would be better. Any suggestions would be appreciated.

 

[At The Bus Stop]

I think cotton is quite stretchy(?) and may not be a good option - hence why polyester is the better option.

I've heard something like a static climbing rope is perfect, because it's designed to be ragged around, another option if you needed it!