Merino wool sweaters offer a lot to love ... that it 3D knits each Planet Earth sweater from a single merino-cashmere thread, which piqued our interest. 3D knitting works much like 3D printing ...

Synthetic fibers are more prone to pilling, which is when threads fray and form balls ... wasn’t pre-softened before it was sold. The wool sweater on the right was made in Norway in the 1980s ...