Warmest · Crew
Ultimate Bison Sock
The original. Full cushion, knit in the USA.
- Full cushion underfoot
- 10% American bison, 25% merino
- 30-day wear-them guarantee
$64.00Shop
The Ultimate Bison Wool Sock
Warm feet. Dry feet. All winter.
BisonShield™ is bison wool that was headed for the waste stream, blended with merino and knit in the USA. Full cushion underfoot, warm without the sweat. It is the sock people buy once, then buy again for everyone with cold feet.
30-day wear-them guarantee. Free returns and exchanges.
- 30-day wear-them guaranteeWear them for a month. Full refund or exchange if you do not love them.
- Knit in the USASmall batches, salvaged bison fiber
- 1 lb of trash removedEvery product funds a pound of cleanup from oceans and waterways
- Free returns and exchangesTry it. Send it back if it is not right.
Why bison
What is actually in the sock
The fiber
Bison wool that would otherwise be thrown away
BisonShield™ starts with bison wool intercepted from the waste stream. We blend it with merino so the sock gets bison’s warmth and merino’s softness, and it regulates temperature the way wool does: warm when it is cold, breathable when it is not.
45% recycled polyester · 25% merino wool · 18% nylon · 10% American bison · 2% spandex
The build
Plush cushion, ribbed arch, reinforced heel and toe
Full cushion for long days on your feet. A ribbed arch holds the sock in place without squeezing. The heel and toe are reinforced where socks give out first.
- Warm without overheating: bison wool wicks moisture as it insulates
- Small fits women’s 6–10 and men’s 5–8; Large fits women’s 10–13 and men’s 8–12
- Three colors: Navy, Natural, Red
The guarantee
Wear them for 30 days. If you do not love them, send them back.
On the trail, at your desk, inside your boots. If they are not the warmest socks you own, you get a full refund or an exchange, even after you have worn them.
The bison family
Three ways to wear bison
Same salvaged fiber, three weights. Pick by how cold your days get.
Warmest · Boot height
Ultimate Bison Boot Sock
Same warmth, taller cuff, built for work and winter boots.
- High-calf coverage stops boot rub
- Full cushion, reinforced heel and toe
- Reduced price for imperfect packaging
$64.00Shop
Four-season · Crew
Bison Trail Sock
Lighter bison blend for hiking and everyday.
- Cushioned sole, reinforced heel and toe
- Knit in the USA, year-round weight
- Also in quarter and low-cut
$46.00Shop
From the reviews
What people say after a winter in them
4.8 average from 886 reviews on The Ultimate Bison Wool Sock
My feet have always turned numb in the cold. Then I discovered the Ultimate Bison Sock. They are SO warm, and they are comfortable too (no itch). My feet don’t turn numb anymore! I bought SEVEN pairs between this year and last year.
I have purchased several pairs of these socks because they are simply put the best socks I have ever owned. I live in Minnesota and the winters get COLD, and these socks are my favorite part of the long winters.
These socks are wonderful. I originally bought 3 pairs. I gave one pair to my brother that has poor circulation due to a stroke. He says they are the only sock that keeps his bad foot warm. So this year, I bought him a second pair.
Cozy, great fit, warm not stuffy and cool colors. I wore these with birks in the snow and was warm and dry.
The socks are preferred by my husband for all outdoor sports including hunting and ice fishing. They are the only ones he will wear for the cold winter outdoor activities of Wisconsin.
They fit just right; not too tight on the top; plenty of room in the toes. It feels like my entire foot is cushioned. I’ll proudly give these socks as gifts to my family and friends.
Questions people ask before they buy
What is BisonShield™ fiber?
BisonShield™ is made from salvaged bison wool that would otherwise go to waste, resulting in a soft, warm fiber.
Will these socks keep my feet warm without overheating?
Yes. Bison wool naturally regulates temperature and wicks moisture, so your feet stay warm but not overheated.
What sizes are available and how do they fit?
Two sizes: Small fits women’s 6–10 and men’s 5–8; Large fits women’s 10–13 and men’s 8–12. They run true to size, and they take up more room in a boot than a thin sock.
Can I return them if I don’t like them after wearing?
Yes. Wear them for up to 30 days and still get a full refund or exchange if you are not happy.
Are these socks made in the USA?
Yes, they are knit in the USA.
Every pair
One pound of trash out of the water, every product.
That is the deal on everything we make. Buy a pair of socks, and a pound of trash comes out of a river, a beach, or a bay.
- 1 lb
- trash removed per product
- 30 days
- wear-them guarantee
- USA
- knit in