J.B. Field's Icelandic 'Thermal Hiker I' Merino Wool Sock Color:Black Due to the thickness of

Due to the thickness of these socks we recommend having enough room in your boots

Contents: 40% Cotton

We recommend wearing a liner or sizing down

This sock has all the bells and whistles including a ribbed calf

J.B. Field's Icelandic 'Thermal Hiker I' Merino Wool Sock Color:Black Due to the thickness ofThe Thermal Hiker I is one of the warmest hiking socks on the market due to its high merino wool content and thick cushioned sole for added comfort in boots. If you prefer a more snug fit on your feet, these thermal socks are perfect for you. In addition, these socks are designed to withstand extreme conditions, making a difference where it matters most! Why we use merino wool in our socks: Merino wool is a type of wool that comes from a merino sheep.