Wigwam Mens Everyday Fusion Sock 45% merino-wool/35% stretch nylon/15% 4-channel polyester/5% lycra spandex Made in US Machine wash Unique integrated olefin moisture reducing inner liner keeps feet dry and helps prevent blister Merino wool outer layer for comfort and softness while also acting as an moisture absorbing layer which helps keep you warm Constructed with seamless toe closure and stay put leg for functional comfort Foot hugging fit in a lightweight design Ideal for use with waterproof and breathable footwear