Made with a merino wool blend, the Icebreaker Men's Hike+ Heavy Anatomical Crew Sock has a high level of breathability while maintaining a heavy cushion to keep your foot comfortable over the long haul. The anatomical toe box and LIN toe seam reduce the chance of blisters occurring, and with support along your Achilles heel, ankle, and instep, this sock won't bunch and chafe, so the only dogs barking back at camp will be your neighbor's chihuahua.