72% acrylic, 25% wool, 3% nylon

From the N.Y. Yarns website

Self-striping Mesa is a yarn rich with possibilities for family sweaters, accessories and home décor. The blended quality of the fibers makes it an easy-care yarn with a twist that gives it a season-spanning look and feel. It’s a lightweight yarn that works up quickly on a large hook or needles. The Mesa label features an easy knit, a 2-ball scarf on the label.