Size: Adult regular fit, One Size fits most. Also fits juniors and teens. 50% Merino Wool/50% Acrylic Fully-lined with Comfort Plush with 100% Polyester Less itch feel with Comfort Plush lining. Help those in need, #PROJECTWARMTH: Share a photo wearing your Turtle Fur product and tag us in it. Use #projectwarmth in the caption. We'll see it and send one hat or cold weather accessory to someone in need. When you name a hat after the founder of your company, you better make it a good one. Adding merino wool, cool colors, and a fluffy fleece lining is a great place to start.