It has my brain churning. I could see using this technique to make slipper socks. They'd be thick, meaning they'd be more hard-wearing. They'd be warm because of the double layer of wool. They'd keep my toes warm, for sure.
Oh, speaking of warm toes? The thrummed socks that I made, that feel so cozy on the feet? Well, they fit John perfectly. On me, too big. Back to chilly toes for me. Figures, huh?