Merino wool yarn
Almost every sweater starts with wool. Norwegian wool, like Peer Gynt, is hard-wearing and holds its shape: pieces knitted from it look the same after years of wear. Merino feels noticeably softer against the skin, so pick it if you are knitting something worn next to the body, or for someone who finds wool scratchy. You will find both here, in several thicknesses, from fine yarns for delicate knitting to thick ones that grow quickly on the needles. If you don't know how many balls you need, the yarn calculator tells you exactly, in your size.