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Lorpen designers used a combination of Polartec Powerstretch and Primaloft Yarn insulation to create a shining star among cold weather socks, the Trekking Expedition Polartec Sock. Perfect for big wall climbs in cold weather, wading through freezing streams and rivers chasing your trophy fish, or sitting in a tree stand all day, the Polartec sock also provide heavy padding for your feet on long days.

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  • Familiarity:I've used it several times

These socks are definitely warm and comfortable. Also the polartec power stretch material was the solution to my mountain boots (Scarpa Mont Blancs) that have been plaguing me with heel blisters.

The one thing I'm not 100% about with these is the primaloft underfoot. It adds kind of a weird "flotation"where your foot slips a bit with every step as the two layers of power stretch and primaloft shift. I don't know if this is a ultimately a loser for these socks or not.

Great cold weather option

    Great sock for cold weather activities. Have used one pair on multi-day trips to fly fish in the Fall/Winter. Outstanding option beneath waders for extended periods in the water. Stays put, does not bunch (make sure you get the right size) and durable. These socks have replaced Patagonia Expedition socks and Sierra Primeloft booties.

    Negatives: weight/size and drying time. When wet or damp they are tough to get thoroughly dry even in the foot box of a down bag.

    Overall, outstanding albeit pricey option for cold feet. When the day can be made by staying warm, this is a great option.


      AWESOME socks. But unisex? I think not. The smallest size offered here at BC (Medium) is just too big if you are a women's shoe size 7 - 7.5 or smaller. (HINT HINT- SELL THE SMALLS!!!) The padded sole is really nice, just make sure you have room in your boots for them.

      am I really seeing the price for these...

      am I really seeing the price for these correctly? WOW $70 for a sock that is crazy. I really want them though lol

      Best Answer


      Yes that price is correct, and they are one of the more expensive socks I have seen too, but the proof is in the pudding. A combination of Polartec Powerstretch and Primaloft Yarn insulation keep your feet warm while compression zones help to promote blood flow throughout the lower leg.