Go further, stay comfortable. Designed for long days hiking in extreme terrain and conditions. Easy on the foot, but tough on cold, sweat, heat, and 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
40% Merino wool / 25% Bison down / 31% Nylon / 2% Polyester / 2% Spandex
Our World-Famous Bison Wool Socks
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| Trekker - Advantage Gear Boot Socks- New Run | Pro Gear Boot Socks | Kenai - Ultralight Gear Boot Sock | Pure Prairie - 100% Natural Crew Socks | Pro Gear Crew Socks | Yellowstone - Advantage Gear Crew Sock | Casual Crew 2.0 - Ultralight Gear Crew Socks | Red Dog Kids American Field Jr. - Crew Socks | The B.O.S.S. - Ultralight Gear Short Sock | No-Show - Ultralight Yak Ankle Socks | O.T.C. - Advantage Gear Compression Sock | |
| Height | Boot 14" | Boot 12" | Over-the-calf | Crew | Crew | Crew | Crew | Crew | Ankle | Ankle | Over-the-calf |
| Weight | Extra Heavyweight | Midweight | Midweight | Midweight | Midweight | Heavyweight | Lightweight | Midweight | Midweight | Lightweight | Midweight |
| Performance Blend | Advantage Gear | Pro Gear | Ultralight Gear | Advantage Gear | Pro Gear | Advantage Gear | Ultralight Gear | Ultralight Gear | Ultralight Gear | Advantage Gear | |
| Cushioning | Full cushion | Under foot cushion | Under foot cushion | Flat knit (no cushion) | Under foot cushion | Under foot cushion | Flat knit (no cushion) | Full cushion | Under foot cushion | Flat knit (no cushion) | Under foot cushion |
| Recommended Footwear Type | Waders, Muck Boots, Heavy Boots | Insulated Boots, Cowboy Boots | Insulated Boots, Cowboy Boots | Athletic Shoes, Short Hikers | Just about anything | Short boots, Hikers, Trail Shoes | Athletic Shoes, Short Hikers | Just about anything | Athletic Shoes | Just about anything | Just about anything |
| Typical Use | Extreme cold climate | hiking, hunting, fishing, skiing, snowmobiling, sledding, ice skating, dog-walking | Fishing/Hunting/Hiking | Daily Wear (warmer climates) | Daily Wear (all climates) | Hiking, Hunting, Just a good warm sock | Daily Wear (warmer climates) | Anything, Everything | running & tennis shoes, casual loafers, golf, shooting sports, short hikers, daily wear | Non-medical grade compression | |
| Base Yarn | 50% American bison down / 50% Merino wool | 50% American bison down / 50% Silk | 34% Bison Down / 33% Ultrafine Merino Wool / 33% bamboo fiber | 50% Bison Down / 50% Merino Wool | 50% American bison down / 50% Silk | 50% American bison down / 50% Merino wool | 34% American bison down / 33% Merino wool / 33% Bamboo | 33% American bison down / 33% Merino wool / 33% Bamboo | 34% American bison down / 33% Merino wool / 33% Bamboo | 70% Yak Down / 30% Nylon | 50% American bison down / 50% Merino wool |
| 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 | FOOT: 29% American bison down / 28% nylon / 25% bamboo / 16% merino wool / 2% Spandex | LEG: 72% polypropylene / 26% nylon / 2% Spandex | 50% Bison Down / 50% Merino Wool | 30% American bison down / 30% silk / 30% nylon / 4% Tencel / 4% polyester / 2% Lycra spandex | 40% Merino wool / 25% Bison down / 31% Nylon / 2% Polyester / 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 / 23% Bamboo Fiber / 23% Nylon 4% Poly / 2% Spandex | 24% American bison down / 24% merino wool / 24% bamboo / 23% nylon / 3% polyester / 2% Lycra spandex | 53% Nylon / 41% Yak Down / 4% Polyester / 2% Spandex | 45% merino wool / 31% nylon / 18% American bison down / 4% polyester / 2% Lycra 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 | Made in the USA | Made in the USA |
| Customer Reviews |
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Customer Reviews
100% real reviews from real customers.
We partner with a third party reviews platform to ensure the integrity and authenticity of our customer reviews. We cannot edit review ratings and do not curate our reviews.
W
The sock is great but the sizing is wrong. They are more of a man’s medium or woman’s large. They would fit my husband. They are too big for my size 6.5 feet. The smalls in all of the other socks I have are better. However, because I love this brand so much, I didn’t let him have them (as he wanted) but kept them as a second pair of sleep socks.
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.
A
I’m all set! I ❤️ These socks!
L
Great color, size, style, and meaning. Buying a few more pair so these can get washed!
L
I have been wearing these socks for almost a month outside in the coldest parts of the night for my work and I am so impressed with how warm they keep my feet. I plan on buying more of these socks for myself in the future. I also plan on buying other products like your scarf and gloves.
K
These socks are great to wear regardless of temps. Walked in 90 degree weather, no problem. Feet were comfortable. Also this company has great customer service.
B
I love these socks and I'm so happy I ordered them! I was in fact in Yellowstone and couldn't resist getting Yellowstone socks. I'm a UK size 7.5, EU 41, US women's 10 - so right on the border of Medium or Large. I couldn't find reviews which said which way to go, I went with Medium and they fit PERFECTLY. I hope this helps someone else who might be between sizes. They fit great, got a little bit of stretch when I put them on, really comfortable. Absolutely love them!
J
Comfy. Could wear every day.
J
Great socks! I am very cold natured and my feet are cold most of the time. These socks not only keep my feet warm they are soft and very easy to clean!
Thank you
L
Excellent quality. I love these socks.
I
Great quality and toasty warm!
B
Very warm probably warmest socks I’ve worn going to buy more before next winter
E
Great socks given as a gift. I have a pair that I love too.
M
Best socks for around the house or traipsing outside in the cold. Soft and roomy in the toe box while hugging the foot arch,
D
Warm, comfortable and well made.
p
i got this pair of socks for myself mainly for cold feet watching tv at night,previously i was using the thicker boot sock version,but was pleasantly surprised these crew socks work just as well keeping feet warm,the crew sock is easier for me to put on,don’t get me wrong the crew sock is thick just not as thick as boot sock i also have alpaca socks, the bison socks are superior for warmth at least the way i am using them for
W
Yellowstone - Advantage Gear Crew Sock
J
No more cold feet when I walk my dog or ride my bike, thenk you
C
I really like The Buffalo Wool Company socks. I had never tried this particular style, but they are wonderful for northern Michigan winters
J
Love how they feel. The extra support for the foot bed feels supportive and feet don't feel tired after walking all day. Have 4 stars ONLY because We wish same sock was offered in a low cut like the no show or ankle height.
S
Boys (30 year olds!), dogs, and I travelled through Yellowstone last Spring, meeting and seeing those amazing Bison! Somehow I discovered this gem of a company, and ordered the “bison” crew socks for them for Christmas. They LOVE them! “Soft, comfy, cool bison logo” is how the socks were described! Best Christmas gift ever!
Plus we bought the big pet bed for the dogs! Great choice!
T
My husband said these sock are outstanding. The alpaca socks are nice. But the way his feet sweet. The Yellowstone Advantage Gear Crew Socks are out standing. They Kept his feet warm during hunting season, with temperatures down to -10. 5 Stars
R
Best socks I have ever worn. So warm you don't want to take them off.
S
Excellent quality, I would buy these again.
H
These are simply the best wool socks I’ve ever owned. The buffalo wool is thicker and warmer than merino or alpaca without feeling heavy or itchy, and the craftsmanship is outstanding. I bought the largest size and they fit perfectly. Highly recommend.
Delivery was quicker than expected which was a pleasant surprise. I also appreciate the company’s newsletter, it’s genuinely interesting and helpful.
W
I am looking forward to getting more of these for summer.
P
Yellowstone - Advantage Gear Crew Sock
J
very warm and comfortable
J
How do I exchange Medium (gift socks) for Large?
We are happy to process an exchange. Return them along with a note including your name, address and your exchange request. We will get them the exchange back out to you quickly.
The Buffalo Wool Co
201 Spring Creek Pkwy
Weatherford TX 76087
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.