Thorlo Outdoor Fanatic Socks

Size Chart
Silver Fox
Glacier Blue
Purple Mountain

Designed for backpacking, trail running, speed hiking, or canyoneering the Outdoor Fanatic socks are made to help you reach the peak. Thorlo's Outdoor Fanatic socks deliver natural odor reduction with the use of Copper-Ion technology--a secret weapon when you're on trail and miles from a washer dryer. No-rub toe seam won't irritate toes. Added venting and blended PrimaLoft wool encourages moisture wicking away from feet as well as increased temperature regulation. The Outdoor Fanatic sock has compression-grade arch and ankle support for tendons and plantar fascia. Added benefit? A comfortable, bulk-free fit that stands up to the pull of hiking boots. One sock does all approach, maximize your outdoor experience with Thorlo's Outdoor Fanatic.


  • Unisex Sock
  • Crew Height
  • Specifically designed for speed hiking, backpacking, canyoneering, peak bagging, and trail running
  • Moderate Cushion
  • Copper-Ion Technology: CuTEC copper yarns provide odor reduction and anti-fungal properties
  • Low profile toe seam won't rub or irritate feet
  • Flow-Thru venting: Ventilation panels in the arch and instep for better airflow
  • Impact Protection: Integrated variable loop padding for enhanced protection without the bulk
  • Strategic Support: Form fit with compression-grade ankle and arch support protects plantar fascia, fights fatigue, and prevents bunching and twisting
  • Sculpted, contoured light padding protects ankle bones
  • Shear Reduction: Special friction-reducing yarns for durability and skin protection
  • Performance Fabric: Blended PrimaLoft merino wool with siliconized polyester for insulation and wicking throughout
  • Made in the USA


22% THOR-WICK Cool Copper Polyester, 18% PrimaLoft (50% Merino Wool, 50% Polyester), 18% Nylon, 10% THOR-WICK Cool, 6% Elastic, 2% PTFE Treated Polyester

Sock Height

Crew Height Sock

Sock Cushion

Medium Cushion Sock

Customer Reviews

Based on 13 reviews
Excellent quality sock. FIt me

Excellent quality sock. FIt me well lengthwise, a shoe size 10. Too short for an 11 or a 12 foot. Very snug.

Comfortable and sturdy!

Comfortable and sturdy!

Good sock. Good price. Good

Good sock. Good price. Good delivery.

Birthday gift

I just received my order and it was a shock! I ordered my son 2 pair of crew socks. One was what I'd ordered the other is called a quarter crew. I pulled up my order online and the socks I receive are nothing like what I ordered. I've attempted to contact customer service because I dont feel I should have to pay to return these. So far, I haven't been able to talk to anyone.

Great Outdoor Sock

I bought these to wear with my hiking boots. The fit was perfect. They are incredibly comfortable and stay comfortable through heavy activities.