This zzzz is made with eight-ply wool, The number "Eight-ply" indicates that the yarn is made by twisting together eight individual strands or plies. The more plies a yarn has, the thicker and heavier it tends to be. In general, higher ply numbers result in bulkier and warmer yarns. However, it's worth noting that the exact thickness and weight of yarn can vary depending on the fiber content, spinning technique, and manufacturing process.