100% wool. 50% merino wool. The wool is mulesing-free and certified organic. The dyeing process is certified to be environmentally friendly. Even the finest wool may be subject to some pilling after repeated wear. Carefully remove any pilling. We suggest airing this garment or steaming with an iron. As a last option, hand wash cold or wash in the washing machine set to the hand-wash cycle. Use wool detergent. Gently reshape while damp. Dry flat. Store flat. Shrinkage 4-5%. Made in Dongguan, China.