Log In / Register
0 Checkout
Klim Mammoth Socks

Please select a Size to check availability, or to add this item to your Shopping Cart or Wish List.


Select Size:

Size Chart

Select qty:

Please select a Size to view availability.
Add to Wish List

View more like this:

Klim Mammoth Technical Socks

The Mammoth Sock is Klim's 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 for added warmth and padded comfort
  • High thermal retention value to help hold heat in
  • Above calf design
  • Ankle support stretch band to help keep sock in position, no slipping or bunching
  • Arch support stretch band to help keep sock in position, no slipping or bunching
  • Patterned bend and regular knit at front mid ankle to help prevent bunching
  • Above calf height for warmth and comfort
  • Nylon reinforced toe, heel and sole for ultimate durability
  • 43% merino wool, 40% acrylic, 13% lycra, 4% polyamide

Note: Use of a technical sock is required to obtain the full functionality of Gore-Tex boots


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

EU Size 37 38 40 41 42 44 45 46 47 49
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 Item # Manufacturer Product # Availability
Black / SM 970309 6005-001-120-000 In Stock: Ships next business day
Black / MD 970310 6005-001-130-000 In Stock: Ships next business day
Black / LG 970311 6005-001-140-000 In Stock: Ships next business day


Orders $39.99 and over qualify for our fast free shipping offer. Click Here for FREE Shipping Terms and Conditions.

Please see our International Orders page for orders shipping outside the US.

We show real-time availability on this product page when you select the size/color item you want.  Most items will ship the same business day an order is placed,however if an item requires additional processing time a message will be shown indicating such.

See our full Shipping Policy for further details.


If your order arrives and it is not right, we will we'll fix it, NO NONSENSE, we promise.

Doesn't fit or just not happy with it? You can return any new, unused and unaltered item within 30 business days of delivery receipt of your item. We will issue a full refund to your original payment method.

See our full Return Policy for all of the pertinent details.

Write a Product Review for a chance to win our monthly $100 giveaways.
Klim Mammoth Socks 5 5 3 3
Very very warm The fit is great, very soft, very thick, very warm,very comfortable to wear all day in steel toed boots and my riding boots, I would buy this product again ! April 5, 2015
Excellent warm sock, runs large These are nice, thick, comfortable, WARM socks. If you're riding in cold weather and have a little room to spare inside your boots, you won't regret getting these. For sizing, guidance shown on other web sites is SM = 4-6, MD = 7-10, LG = 11-14. However, I'm a 6-ft 240-lb gentleman with shoe size 11, and I found the Medium fits me with room to spare. They pull up to just below the knee, and would probably fit a size 12 foot just fine. December 8, 2014
Great Thick Socks These socks are very thick and warm. Riding in 70 degree weather was not too warm. Riding in 40 degree was not too cold. October 28, 2014
1-3 of 3
Use our Product Q&A for a chance to win our monthly $100 giveaways.

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: 2 Questions, 4 Answers
Sort by:
RevZilla Store asked: Why did you choose this?
Joaquin R: "Quality and Price" Mar 31, 2015
jaime g: QUALITY AND COMFORT Feb 10, 2015
Dennis D. M: I just got to see what a $33 pair of socks will wear like. Honestly, I want more than just a cotton wad of a sock flopping around in my boots. Jan 27, 2015
Joe H: Previous experience with Klim Mammoth socks. These newly designed socks are even better than my old ones, these are GREAT! Jan 16, 2015
Mark A asked: how does this sock compare in warmth to the RevIt winter sock? Nov 30, 2014
Answer this · Send to friends Good question? Yes (0) No (0)