These socks are thick, warm, and comfortable. They start with soft merino wool (80%) that is itch-free and wicks away moisture. We added acrylic (15%), stretch nylon (4%), and Lycra® (1%) for top-to-toe stretch, durability, and support. A great stocking stuffer. Made in the USA. Machine wash. 80% merino wool/15% acrylic/4% stretch nylon/1% Lycra® Machine wash. Lycra® from top-to-toe for stretch, comfort, durability, and support. Soft, itch-free merino wool. Moisture wicking. Knit on unique 54-needle machine that adds bulk and loftiness. Height: 9½" to 10½" Made in USA.