Turtle Fur - Women's Aerator, Lightweight Merino Wool Aerated Beanie, Eggplant Size One Size Size: Adult, One Size fits most. Also fits Juniors and Teens Lightweight Knit Merino Wool Blend - 50% Merino Wool, 50% Acrylic Fully Self-lined with Contrasting Color Regular Fit Perfect for hiking, camping, skiing, snowboarding, snowshoeing and other outdoor activities.