Yellowstone Bison/Merino Crew Socks Bison Footwear The Buffalo Wool Co.
Sock Sizing Guide:
Small: US Women’s 3 – 6.5, no size for US Men.
Medium: US Men’s 7 – 9, US Women’s 7 – 10.
Large: US Men’s 9.5 – 11.5, US Women’s 10.5 – 12.5.
X-Large: US Men’s 12 – 14, no size for US Women.
Yellowstone - Advantage Gear Crew Sock
Yellowstone Bison/Merino Crew Socks Bison Footwear The Buffalo Wool Co.
Yellowstone Bison/Merino Crew Socks Bison Footwear The Buffalo Wool Co.
Yellowstone Bison/Merino Crew Socks Bison Footwear The Buffalo Wool Co.
Yellowstone Bison/Merino Crew Socks Bison Footwear The Buffalo Wool Co.
Yellowstone Bison/Merino Crew Socks Bison Footwear The Buffalo Wool Co.

Yellowstone - Advantage Gear Crew Sock

Sale price$ 42.00
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  • Made in the USA
  • Base Yarn Composition: 50% American bison down / 50% Merino wool
  • Overall Composition: 36% Merino wool / 28% Bison down / 26% Nylon / 8% Polyester / 2% Spandex
More info on base yarns and fiber composition

Making more yarn to make more of these now. Probably won't see socks till end of March.

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 sizing guide for US men and women
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 gear

Material 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.

Yarn Base Composition

50% American bison down / 50% Merino wool

Guide to fiber composition

Overall Composition

36% Merino wool / 28% Bison down / 26% Nylon / 8% Polyester / 2% Spandex

Our World-Famous Bison Wool Socks

Advantage Trekker Bison/Merino Boot Socks Bison Footwear The Buffalo Wool Co. Medium 1 Pair Pro-Gear Technical Boot Bison/Silk Socks Bison Footwear The Buffalo Wool Co. Medium Kenai - Ultralight Gear Boot Sock Pure Prairie - 100% Natural Crew Socks Pro Gear Crew Socks Yellowstone Bison/Merino Crew Socks Bison Footwear The Buffalo Wool Co. Casual Crew 2.0 Bison/Bamboo/Merino Bison Footwear The Buffalo Wool Co. Medium One Pair Red Dog Kids American Field Jr. - Crew Socks The B.O.S.S. (Best Overall Short Sock) Bison Footwear The Buffalo Wool Co. Natural Medium No-Show - Ultralight Yak Ankle Socks O.T.C. - Advantage Gear Compression Sock
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 36% Merino wool / 28% Bison down / 26% Nylon / 8% 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
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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.

Read more about how we spin our American bison yarns

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