Whatever your activity is, whether it's hiking on the trail, riding on a bike, or working in the yard, we have a wool sock that will meet all of your needs. We took American sourced merino wool which is soft, warm, and moisture wicking, and then we added anti-microbial silver in the heel and toe to really kill the odor. This is a sock you can wear for days if needed. The interior of the sock is terry knit, with big loops of soft merino that create a nice padded layer of comfort and warmth. (Take a look at the slide show for pictures of the terry knit inside). This is a rugged style boot sock, but it's not too thick, it will fill out your shoes or boots without crunching your feet.