holy hemp!By naturals you guys mean non-synthetic? I climbed for many years on manilla or hemp. It was a damn nice, workable line. Think they found it got heart rot when worked in orchards and around rotting apples or something and you could not notice the slightest defect. I like that black widow skinny stuff for small rigging but I would not use it on rough bark like hackberry crotches. It has 7k tensile but I d be afraid to shock load it too much. It goes w a minny porty. You prob want to have some leather gloves if you re the groundy.