The wrapper says it is Dralon microfiber, Fine=#2 weight.
Older labels show a Knitting gauge of 5.75 - 6.5 sts/inch (23 to 26 inches) with 3.25 to 3.75 mm needles which equates to sport weight by Ravelry standards.
6-ply, S-twist, floss-like, self striping
6x2-ply: each of 6 plies is 2-ply. Very soft, nice sheen. Self striping with occasional dark blotches.
Machine wash and dry inside out, warm water, gentle cycle. Tumble dry low heat, do not over dry. No iron, no bleach.
“Dralon® is a trademark for German acrylic made in plants in Dormagen and Lingen using dry-spun and wet-spun technology. Dralon GmbH is the largest producer of dry- and wet-spun acrylic fibers worldwide. Dry-spun fibers are a specialty among acrylic fibers. They come closest to natural fibers in handling and appearance, and are ideally suited for all blends with natural fibers such as wool, cotton, linen, mohair, etc. Wet-spun types show the known and certified Dralon quality and high reliability. They look best when dyed in brilliant shades in the whole range of colours within many fields of applications. All Dralon fibers show outstanding light and weather resistance, and give garments easy wash and wear properties.”