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Klim Mammoth Socks

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Klim Mammoth Technical Socks

The Klim Mammoth Sock is our warmest and thickest technical sock designed to enhance the performance of GORE-TEX® boots by wicking moisture away from the skin allowing the foot to stay warm and dry even in the harshest environments.

  • 100% Terry Construction
  • High thermal retention value
  • Reinforcement in sole, heel, toe and ankle
  • Ankle support band
  • Arch support band
  • Patterned bend
  • Wicks moisture
  • 85% Merino Wool
  • 12% Lycra
  • 3% Polyamide
  • Men's Sizing: 4-6 Small; 7-10 Medium; 11-14 Large

Note: The Klim Mammoth Technical Sock is recommended to obtain the full functionality of GORE-TEX® boots.

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Klim Mammoth Socks 4.7 5 10 10
good socks A little expensive for a single pair of socks but they are KLIM. Very comfortable and warm so far. January 29, 2014
Best Sock I've Found! These socks have the highest percent of Merino Wool I've found...85%! Great thing about wool is it will keep you warm even when wet so as your feet sweat these socks will still keep your feet warm as it wicks the moisture away. January 13, 2014
Nice socks for winter I use them for the office commute so they will keep my feet warm on my ride to the office. December 4, 2013
Just wanted them to do one thing Keep my feet warm! Did not matter what they cost as long as they worked and price was reasonable. Wore them to a football game at 28F standing on concrete and they were fine. Thick too, so be careful that your boots are still able to fit. December 2, 2013
the best cold weather sock I've ever used I commute in the northeast at 4:30 am, Its been a cold fall this year, sub freezing in my area at least a few days a week. no more doubling up socks, I need to get more. November 11, 2013
really warm! Well, they're socks. They're warm, better than my old ski socks. A bit too long for my legs, but, eh, it's not really a problem! May 27, 2013
Excellent Winter Riding Sock I have approximately 3000 km of riding wearing these socks in cooler temperatures ranging from 15 - 40 degrees F under the TCX Infinity GTX boots on a Triumph Tiger 800. Even in moderate winds on a 20 F degree day, I was able to ride comfortably for 2 hours. After 2 hours, my toes started to get cold, but not annoyingly so. Pros: nice cushion, just enough elastic, high percentage of Merino wool, don't stink, warm I am thoroughly satisfied with these socks. Just try to avoid catching the socks on Velcro as it pulls the wool. January 19, 2013
Decent sock, sung fit, good buy. Bought these socks on the strength of a couple decent reviews I read. They are a snug fit - the large is for shoe size 11-14, I got large and I am a size 10, so I recommend buying a size up. They are knee length which is nice and not so thick as to cause an issue with getting your boots on. They are warm but honestly not any warmer than the socks I was using, which were from Sportsmans Warehouse. A good sock at a fairly high price but overall no complaints. December 6, 2012
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Have a functionality, fit, or otherwise product-specific question about the Klim Mammoth Socks? Ask it here! If you have a customer service or shipping question, please direct it to our Customer Service department.

Klim Mammoth Socks
Already Asked: 1 Question, 2 Answers
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RevZilla Store asked: Why did you choose this?
Scott F: LOVE these socks. Extremely comfy and warm. I just wish they were cheaper so I could buy more of them. Mar 27, 2014
Shanon M: Because everything else I have from Klim is a stellar product. Jan 11, 2014


We highly recommend finding a cloth tape measure and taking the time to take these measurements.  Klim sizes will not necessarily correlate with fitment in other brands.

Klim Men's and Women's Footwear

5 - 14 based on Men's sizing

Men's 5 6 7 8 9 10 11 12 13 14
Women's 7 8 9 10 11 12 13 14 15 16

Sizing information is provided by the manufacturer and does not guarantee a perfect fit.

Click here to see the full Klim Size Chart
Product Style RevZilla SKU ID Manufacturer Product # Availability
SM 721547 6005-000-120-000 In Stock: Ships within 24 hours
MD 721548 6005-000-130-000 In Stock: Ships within 24 hours
LG 721549 6005-000-140-000 In Stock: Ships within 24 hours