Hemp yarn does soften with each washing. I’ve used Allhemp 6 from Lana Knits and am currently stranding some Allhemp 3 along with some fingeringwt. sock yarn to make a baby sweater. It ends up being very drapey. I found the hemp easier to knit with than linen and regular dishcloth cotton yarn. I’ve also knit with corn based A’maizing (I think that’s how you spell it). The yarn was flat and ribbon like, it was stretchy. I liked it–used it in a baby sweater, a gift,–worn once I think and is now being worn by a teddy bear! It was on the expensive side and eventually the LYS ended up adding it to their sales bin. I, of course, picked up more–I would get the exact name, but the yarn stash is in a closet that’s blocked by a upturned bed and a couple of dressers—stripping wallpaper and painting another room! Good incentive to get it all done, so that I can return to knitting and the stash!