So i am thinking about getting a ring sling

My questions are - what's the difference between cotton and hemp? I know that hemp is stronger than cotton but is that all? Do you need to iron the hemp sling (just asking cause all the pics i have seen then hemp looks all crinkly in the tail and that would annoy me if i had to iron it all the time lol)

If you have one, do you love it? i was just thinking about sling i could use for ds now and a newborn. I already have a peanut and ergo but didnt like either of those for newborn and feeding (oh and no i am not pg - just sling shopping ).

I pretty much use my ergo all the time but i do like the look of the ring sling. Can you wear baby for long periods comfortably - like 1-2 hours?

Thanks everyone x