Winter is coming, and during the colder months one of the more unpleasant feelings we can have is that of ice-block feet. When the winter makes its way into our shoes or boots, and our socks simply cannot withstand the cold, we suffer. This makes it a lot less fun to build a snowman or hike through the woods, which is where thermal socks come into play. In this article, we'll explore a variety of brands of thermal socks, including 35 Below Socks. Choosing the right sock means keeping warm, so check out the toasty socks we reviewed below.

Product FAQ

Following is a brief frequently asked questions list  on 35 Below Socks to provide a comprehensive understanding of the main brand we're focusing on, which will frame our understanding of the other pairs of socks we'll also be presenting.

1. What Are 35 Below Socks?

2. What Do 35 Below Socks Do?

3. What Makes 35 Below Socks Special?

4. Where Can You Buy 35 Below Socks?

What We Reviewed

  • As Seen on TV 35 Below Socks

  • Wigwam Wool Canada Crew Socks

  • ActionHeat 3.7V Rechargeable Battery Heated Socks

  • J.B. Extreme -30 Below XLR Winter Sock

  • SmartWool Men's PhD Ski Medium Socks

  • Warrior Alpaca Socks

  • SmartWool Men's Mountaineering Extra Heavy Crew Socks

  • Blue Flame Thermal Socks

  • Darn Tough Vermont Hiker Boot Full Cushion Sock

  • Lenz Heat 1200 1.0 Ski Sock Mens

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Nylon-infused threading to reflect your inner heat, with nylon knit material for moisture wicking. See above for the full explanation on the 35 Below socks.


  • Keeps feet warm
  • No batteries or recharging
  • Thin enough to be worn underneath other socks


  • Only comes in two colors
  • Plain in terms of design and style

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Wigwam Mills, Inc. of Sheboygan Wisconsin has gained notoriety for producing some of the best produced domestically made thermal socks on the market. The brand has been around for over 100 years.


  • Stylish dual-colored design
  • Made of wool in the United States
  • Sock have a stay-on colored band that matches the heel


  • Comes in just three color options

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The ActionHeat heated socks are rechargeable and put out actual heat to keep your feet warm rather than simply keeping in or reflecting the heat like most of the other socks on this list. These socks employ innovative technology to warm the core body temperature with built-in heating panels. The heating panels are made of ActionFlex material that generates warmth in a lightweight and comfortable design that is versatile. A single charge provides 10 or more hours of warmth in the socks, with the heat-trapping fabric supporting the retention of the heat produced.


  • Rechargeable heated socks
  • Energy efficient
  • You can adjust the heat to your preference


  • Rather costly for a pair of socks
  • The foot part of the design looks like a spatula

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This model of winter sock is made for persons who are outside quite often in the cold. They are handmade in Canada and manufactured to provide the highest level of warmth alongside the greatest comfort possible, even in the most extreme winter conditions. The brand comes with a no-risk guarantee as the company is confident you'll love their products; and if not, will stand behind their guarantee.


  • Comes in a variety of colors
  • Full cushion and impact zones
  • Made of fine quality Merino wool, with nylon and spandex
  • Check Circle
    No-risk guarantee


  • These don't have many cons

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This brand of winter sock features maximum warmth and breathability for when cold weather starts biting, using patent-pending "Indestructawool" technology that provides maximum durability. These socks are designed to be used by skiers, and thus are capable of handling the coldest of winter days. The socks are made of Merino wool and nylon, and have a virtually seamless toe for maximum comfort. Features the SmartWool 4 degree elite fit system for a sock that won't sip, bind, or bunch.


  • Medium-cushioning on foot and shin for impact absorption and warmth
  • Two elastics to make sure the socks stay in place
  • Mesh ventilation zones for breathability


  • The sock reaches very high onto the calf

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The Warrior Alpaca Socks are made predominantly of alpaca wool. They are entirely sheeps's wool free, which is a relatively rarity in the market of thermal socks. Feet are able to breath feely while wicking away moisture. They are terry-lined and made of a highly durable construction. This model is made particularly for boot wearers, and they are extra tall, fitting over the calf. They are ideal for skiing, motorcycle riding, snowmobiling, horseback riding, and other outdoor sports, although they are equally comfy inside by the fireplace.


  • Made of Alpaca, in addition to acrylic, nylon, and elastic
  • Breathable fabric that


  • Only one color choice

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The Warrior Alpaca Socks are made predominantly of Merino wool in addition to nylon and elastane. This brand began on a Colorado ski slope when the founders of the company made a commitment to create a product that would ensure that our feet would never become cold again. They've lived up to their promise with these warm socks. The socks are knit in the United States and have a crew-sock height. These socks feature a flat-knit toe seam for maximum comfort.


  • Stylish two-tone colors
  • Made with Merino wool
  • Check Circle
    Features a SmartWool fit system with ankle and arch braces


  • Only available in three color choices
  • Might be a bit low-cut compared to the others reviewed

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Blue Flame thermal socks claim to be the "World's Warmest Thermal Socks", although whether this is true remains to be seen, as the brand has only l4 reviews on Amazon and comes in at 4.5 stars. They are made of 92% acrylic, 6% polyester, and 2% spandex, making them the most artificial pair of winter socks we've reviewed. They are made for the outdoors and designed for hiking.


  • Comes in khaki color
  • Moisture-wicking


  • Comes in just 2 colors
  • Bland design
  • ban
    No reinforcing collar

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These are stylish, colorful, and warm socks produced in the United States by Darn Tough. They carry an unconditional life guarantee, unlike any of the other brands we have reviewed, and, as the name implies, they are made in Vermont.

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These are a pair of heated socks that are rechargeable, with the heat level controllable via your smartphone for a fully adjustable option to keep warm in the cold. These are very high socks, and are designed for skiers and so will fit comfortably in your ski boots to keep your feet warm on the slopes all day.


  • Customizable heat levels
  • Cutting-edge technology
  • Check Circle
    Heat for up to 14 hours


  • The heating elements are only on the toes and ball of the foot

The Verdict

Of the many pairs of socks that we've explored to keep our feet and toes properly warm over the coming chilly months, the most economical brand reviewed was the 35 Below Socks, coming in at just under $20 for three pairs. In terms of style, the JB Extreme 30 below socks were stylish, warm, and came in a variety of colors. Whether you're hanging out indoors by the fire, or in the freezing cold for a dozen hours, there is a winter sock option for you above to keep those feet and toes warm all the winter long.

For more information on the gear we need to enjoy and engage with the outdoor world, check back to Outdoor Sport Insight for ongoing articles and updates.

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