Wigwam Mens Down Range Fusion Sock 55% merino-wool/25% stretch nylon/17% olefin/3% 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 and cushiony all over sole for functional comfort Ideal for use with waterproof and breathable footwear