Am swatching up an interesting new novelty yarn from Louisa Harding, called Flotsam. (At least it's not named after an Abba song.)
40% cotton, 35% polyamide, 15% acrylic, 10% viscose. It feels a bit like paper. Trying it out for my Optimist Scarf. It's the sort of yarn that doesn't really lend itself to a solid fabric (despite some of the supplied patterns), but makes really great low-effort, high impact accessories. A one-ball wonder. The colourways are interesting, too.