So-called Guanashina, produced by France’s legendary cloth maker Dormeuil, is known as one of the most luxurious and technically advanced fabrics in the world. The name is an amalgamation of the rare ...

The guanaco, a wild cousin of the llama, produces a lightweight, insulating fiber that’s highly prized in high-end fashion. Prices can reach $1,200 per yard due to strict regulations on harvesting.