Size Chart
Sock Sizing
Socks should fit as well as any of your other garments. The heel should sit on your heel and not under it as in a sock too small, nor half way up your Achilles as in a sock that’s too large. Socks should be flush against your foot with no extra material sagging. The toe seam should lay flat across the top of the toes.
Sock Heel at Your Heel
The sock heel should sit on your heel, not under it or above it.
Flat Toe Seam
The toe seam should lie flat along the top of your toes, not above or below.
Taut Across the Foot
Socks should be taut across your foot with no sagging material. If you wear a wide shoe size (E+), consider sizing up.
| Shoe Size | US Men | US Women |
| Small | – | 3 – 6.5 |
| Medium | 7 – 9 | 7 – 10 |
| Large | 9.5 – 11.5 | 10.5 – 12.5 |
| X-Large | 12 – 14 | – |
Insole Sizing
The right insole can make a significant difference to your comfort. The insole should fit the shape and contour of your shoe and the length should be a perfect match. The toe of the insole should not crumple up against the inside of the shoe, nor should it be too short.
Insole Matches Shoe Contour
The insole should fit the shape of your shoe, without any overhang or gaps.
Perfect Length
The insole should match the length of your shoe perfectly. The toe of the insole should not crumple or be too short.
| Shoe Size | US Men | US Women |
| Small | 5 – 6.5 | 6 – 7.5 |
| Medium | 7 – 8.5 | 8 – 9.5 |
| Large | 9 – 10.5 | 10 – 11.5 |
| X-Large | 11 – 12.5 | 12 – 13.5 |
Our Trekker Boot Socks are our heaviest, most insulating, and most wicking sock. We’re sure these are likely the warmest socks on the planet. Well, the warmest that aren’t electric but they are silly and pretty impractical!
Trekker Boot Socks = Workhorse Gear
Designed to be your go-to extra heavyweight boot sock, our Trekkers are extremely thick, quite soft, and well built. Created with ultra-soft bison fibre, these socks are thicker and more cushioning than our Pro-gear socks. We use only properly processed bison fibre that is 100% free from stuff that will make the socks itchy or abrasive.
Our Trekkers feature a terry loop padded foot bed and are over-plaited in the toe, heel, and slightly up the leg to make sure your feet will be comfortable all day long.
Despite the extra cushioning and tough construction, these performance designed socks are intended to be worn with footwear. They are not intended to be worn as house slippers. You certainly can, but wearing them on concrete and abrasive surfaces will impact wear.
Trekker Boot Socks are awesome, but don’t just take our word for it!
We gave a pair of our Trekker boot socks to survival expert Leon Pantenburg, and here is his review.
Trekker Bison/Merino Boot Sock Features
Looking for a quick TLDR on the Trekkers? Then look no further. Here’s a quick list of the top features of the Trekker Boot Socks.
- USA Made
- Terry looped footbed with extra padding
- Reinforced toe and heel
- Flat seam toe
- Boot Socks measuring 12 inches from heel (perfect to hold above your boot top)
- Features Bison logo on toe
- Machine wash warm and tumble dry - no need for bleach, iron, or dry clean
Material Composition
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
Overall Composition
33% American bison down / 39% merino wool / 18% nylon / 8% polyester / 2% Lycra spandex
Product Comparison
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| The B.O.S.S. - Ultralight Gear Bison/Wool/Bamboo Short Sock | Casual Crew 2.0 - Ultralight Gear Bison/Wool/Bamboo Crew Socks | Trekker - Advantage Gear Bison/Wool Boot Socks | Yellowstone - Advantage Gear Bison/Wool Crew Socks | Kenai - Ultralight Gear Bison/Wool/Bamboo Boot Socks | Alberta Hiker Light | Alberta SnowDrift | Bison Fibre Beanie | Bison Fibre Gloves | Alberta Hiker | Alberta 1/4 Cuff Sock | Alberta MINI | Alberta Grizzly | ProGear Boot - Silk & Bison Boot Socks | |
| Height | Ankle | Crew | Boot 14" | Crew | Over-the-calf | Crew | Crew | Crew | Crew | Ankle | Crew | Over-the-calf | ||
| Weight | Midweight | Lightweight | Extra Heavyweight | Heavyweight | Midweight | Midweight | Heavyweight | Midweight | Midweight | Lightweight | Midweight | Midweight | ||
| Performance Blend | Ultralight Gear | Ultralight Gear | Advantage Gear | Advantage Gear | Ultralight Gear | Ultralight Gear | Ultralight Gear | Ultralight Gear | ||||||
| Cushioning | Under foot cushion | Flat knit (no cushion) | Full cushion | Under foot cushion | Under foot cushion | Flat knit (no cushion) | Full cushion | Under foot cushion | Flat knit (no cushion) | Under foot cushion | Under foot cushion | Under foot cushion | ||
| Recommended Footwear Type | Athletic Shoes | Athletic Shoes, Short Hikers | Waders, Muck Boots, Heavy Boots | Short boots, Hikers, Trail Shoes | Insulated Boots, Cowboy Boots | Short boots, Hikers, Trail Shoes | Short boots, Hikers, Trail Shoes | Short boots, Hikers, Trail Shoes | Short boots, Hikers, Trail Shoes | Short boots, Hikers, Trail Shoes | Short boots, Hikers, Trail Shoes | Insulated Boots, Cowboy Boots | ||
| Typical Use | running, golf, shooting sports, daily wear | Daily Wear (warmer climates) | Extreme cold climate | Hiking, Hunting, Just a good warm sock | Fishing/Hunting/Hiking | Hiking, Hunting, Just a good warm sock | Hiking, Outdoors, Just a good warm sock | Hiking, Hunting, Just a good warm sock | Hiking, Hunting, Just a good warm sock | Hiking, Hunting, Just a good warm sock | Hiking, Hunting, Just a good warm sock | Fishing/Hunting/Hiking | ||
| Base Yarn | 33% American bison down / 33% Merino wool / 33% Bamboo | 34% Bison down / 33% Merino wool / 33% Bamboo | 50% American bison down / 50% Merino wool | 50% American bison down / 50% Merino wool | 33% Bison Down 33% Ultrafine Merino Wool 33% bamboo fiber | 40% Bison down / 40% Alpaca / 20% Nylon | 40% Bison down / 40% Alpaca / 20% Nylon | 33% American bison down / 33% Merino wool / 33% Bamboo | 33% American bison down / 33% Merino wool / 33% Bamboo | 40% Bison down / 40% Alpaca / 20% Nylon | 40% Bison down / 40% Alpaca / 20% Nylon | 30% Bison down / 50% Alpaca / 20% Nylon | 40% Bison down / 40% Alpaca / 20% Nylon | 50% Bison, 50% Silk |
| Overall Composition | 36% nylon / 25% American bison down / 21% bamboo / 13% merino wool / 3% polyester / 2% Lycra spandex | 26% American bison down / 22% bamboo / 15% merino wool / 34% nylon / 3% Lycra spandex / 1% polyester | 33% American bison down / 39% merino wool / 18% nylon / 8% polyester / 2% Lycra spandex | 36% Bison down / 36% Merino wool / 26% Nylon / 2% Spandex | FOOT: 29% American bison down / 28% nylon / 25% bamboo / 16% merino wool / 2% Spandex | LEG: 72% polypropylene / 26% nylon / 2% Spandex | 40% Bison down / 40% Alpaca / 20% Nylon | 36% nylon / 25% American bison down / 21% bamboo / 13% merino wool / 3% polyester / 2% Lycra spandex | 36% nylon / 25% American bison down / 21% bamboo / 13% merino wool / 3% polyester / 2% Lycra spandex | Bison Alpaca | 32% Bison, 32% Silk, 26% Nylon, 4% Polyester, 4% Tencel, 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 Canada | Made in Canada | Made in the USA | Made in the USA | Made in Canada | Made in Canada | Made in Canada | Made in Canada | Made in the USA |
| Customer Reviews |