Well 6z is stronger than 4z, hemp is much easier to lay and picks up less debris { or to give it the correct name, SHIT } than nylon ones do. But the downside is, hemp rots if not looked after, but are nicer to handle than nylon. If you make your own nets, hemp is a nice medium to work with and needs to be knotted only once, where as nylon needs double knotting! Poke nets are good, they have runners instead of the usual ring and TWO pegs, one each side, the rabbits hit the net and the net purses to the middle as normal, but then it can slide up and down the strings as the rabbit struggles to g