Go further, stay comfortable. Designed for long days hiking in extreme terrain and conditions. Easy on the foot, but tough on cold, sweat, heat, moisture. Slightly lighter weight than our Trekker socks, but still "Seriously warm-Surprisingly soft", our newest extreme sock, that will keep your feet warm and dry all winter long. Ultra-soft bison fiber that has been properly processed, no prickly itch from these socks. Thicker and more cushioning than our Pro-gear socks.
This sock has a terry loop padded footbed, and lighter ribbed construction all the way up the calf with just enough spandex to hold it above your 10" boot top...but not enough to cut down circulation. Nylon over-plaited in the toe and way up past the heel for long smooth wear.
Superior breathability, temperature regulation, and natural odor resistance!!
Sock Sizing
Socks should fit as comfortably as any other garment. The heel should rest on your heel—not under it (as with a sock that’s too small) or halfway up your Achilles (as with a sock that’s too large). The sock should be snug against your foot with no sagging fabric. The toe seam should lie flat across the top of your toes.
Sock Heel at Your Heel
The heel of the sock should sit directly on your heel, not above or below it.
Flat Toe Seam
The toe seam should lay flat along the top of your toes, not above or below them.
Taut Across the Foot
Socks should fit snugly across your foot without any sagging material. If you wear wide shoes (E+), consider
sizing up.
If you wear a wide shoe size (E+), consider sizing up.
| Sock Size | Shoe Size | |
|---|---|---|
| US Men | US Women | |
| Small | – | 3 – 6 |
| Medium | 5 – 9 | 6 – 10 |
| Large | 9 – 12 | 10 – 13 |
| X-Large | 12 – 15 | – |
Care Instructions
Machine wash warm. Then tumble dry. No need to bleach, iron or dry clean.
Once you are ready to clean your gear, follow a few simple steps to care for your favorite socks, beanie, and gloves.
How to Care for your favorite bison fiber gearMaterial Composition
Here at The Buffalo Wool Co., our yarn bases for all our gear is (and will always be) natural fibers. This means that the internal structure of your socks (the parts that touch your skin) will be made from bison fiber, merino wool, mulberry silk, and other 100% natural fibers.
The overall composition (the parts that touch your skin plus everything else) will include other materials like nylon or polyester. This is done to make the sock more durable and ensure that your socks work (and play) as hard as you do.
Overall Composition
36% Merino wool / 28% Bison down / 26% Nylon / 8% Polyester / 2% Spandex
Our World-Famous Bison Wool Socks
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| Trekker - Advantage Gear Boot Socks | Pro Gear Boot Socks | Yellowstone - Advantage Gear Crew Sock | Pro Gear Crew Socks | Red Dog Kids American Field Jr. - Crew Socks | Casual Crew 2.0 - Ultralight Gear Crew Socks | The B.O.S.S. - Ultralight Gear Short Sock | O.T.C. - Advantage Gear Compression Sock | Kenai - Ultralight Gear Boot Sock | |
| Height | Boot 14" | Boot 12" | Crew | Crew | Crew | Crew | Ankle | Over-the-calf | Over-the-calf |
| Weight | Extra Heavyweight | Midweight | Heavyweight | Midweight | Midweight | Lightweight | Midweight | Midweight | Midweight |
| Performance Blend | Advantage Gear | Pro Gear | Advantage Gear | Pro Gear | Ultralight Gear | Ultralight Gear | Ultralight Gear | Advantage Gear | Ultralight Gear |
| Cushioning | Full cushion | Under foot cushion | Under foot cushion | Under foot cushion | Full cushion | Flat knit (no cushion) | Under foot cushion | Under foot cushion | Under foot cushion |
| Recommended Footwear Type | Waders, Muck Boots, Heavy Boots | Insulated Boots, Cowboy Boots | Short boots, Hikers, Trail Shoes | Just about anything | Just about anything | Athletic Shoes, Short Hikers | Athletic Shoes | Just about anything | Insulated Boots, Cowboy Boots |
| Typical Use | Extreme cold climate | hiking, hunting, fishing, skiing, snowmobiling, sledding, ice skating, dog-walking | Hiking, Hunting, Just a good warm sock | Daily Wear (all climates) | Anything, Everything | Daily Wear (warmer climates) | running & tennis shoes, casual loafers, golf, shooting sports, short hikers, daily wear | Non-medical grade compression | Fishing/Hunting/Hiking |
| Base Yarn | 50% American bison down / 50% Merino wool | 50% American bison down / 50% Silk | 50% American bison down / 50% Merino wool | 50% American bison down / 50% Silk | 33% American bison down / 33% Merino wool / 33% Bamboo | 34% American bison down / 33% Merino wool / 33% Bamboo | 34% American bison down / 33% Merino wool / 33% Bamboo | 50% American bison down / 50% Merino wool | 34% Bison Down / 33% Ultrafine Merino Wool / 33% bamboo fiber |
| Overall Composition | 38% merino wool / 30% American bison down / 30% nylon / 2% Lycra spandex | 32% American bison down / 32% silk / 26% nylon / 4% polyester / 4% Tencel / 2% Lycra spandex | 36% Merino wool / 28% Bison down / 26% Nylon / 8% Polyester / 2% Spandex | 30% American bison down / 30% silk / 30% nylon / 4% Tencel / 4% polyester / 2% Lycra spandex | 24% American Bison Down / 24% Merino Wool / 23% Bamboo Fiber / 23% Nylon 4% Poly / 2% Spandex | 26% American bison down / 25% merino wool / 25% bamboo / 20% nylon / 3% Lycra spandex / 2% polyester | 24% American bison down / 24% merino wool / 24% bamboo / 23% nylon / 3% polyester / 2% Lycra spandex | 45% merino wool / 31% nylon / 18% American bison down / 4% polyester / 2% Lycra spandex | FOOT: 29% American bison down / 28% nylon / 25% bamboo / 16% merino wool / 2% Spandex | LEG: 72% polypropylene / 26% nylon / 2% Spandex |
| Origin | Made in the USA | Made in the USA | Made in the USA | Made in the USA | Made in the USA | Made in the USA | Made in the USA | Made in the USA | Made in the USA |
| Customer Reviews |
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Customer Reviews
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Customer Reviews
Based on 261 reviews
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G
Yellowstone - Advantage Gear Crew Sock
L
They are thick maye buy a thinner pair next time
F
Very warm
D
I wear a 10 1/2 Wide shoe, so I ordered the Large sock (Men 9-12). The heel rides up on my Achilles and if I lower it to my heel, the sock bunches up in my shoe and is uncomfortable. Also, I wear my merino wool socks without a sock liner with no problems, but the buffalo wool is itchy on my skin without a sock liner. I'm not impressed with this high priced sock.
I
My wife got these for Christmas last year and I wore them ever since. I got three pairs and two of disappeared as my kids have stolen them to use them! Comfortable, never too warm definitely would moisture away.
L
We continue to like your bison socks and they do keep your feet warm!
D
The perfect blend of material and workmanship to create an amazing experience of feeling and fashion. Great work!
T
True for and very soft.
Great all day comfort.
S&D Spinning Mill, Millbury, MA, USA
Designed from the Ground Up
The Dearnley Family has been running S & D Spinning since the 1800s. This is one of the last large scale wool mills left in the U.S. and they are absolutely crucial to us keeping our production here in the U.S.
