Heavy Expedition - Boot
From summiting Everest to winter extremes, Heavy Expeditions are what this boot-length sock was made for. Our thickest sock places fine gauge merino wool on the inside of more durable outer layer, completely enveloping the ‘custom-fit-feel’ of our patented knitting structures, This keeps you warmer and drier where you need it in the most extreme conditions. Don’t mess around. Off road all the way. Hike, Climb, March, Work, Move
Engineered for Whole Foot Comfort
- Knit with a fine gauge merino wool for temperature regulation and ultimate softness.
- Wicks moisture, dries fast, and resists odors.
- Free Range Toe Box ensures room for your toes while contouring around them.
- Deep Heel Pocket wraps the foot, holds in place, and prevents blisters.
- Tapered Compression stimulates blood low and keeps the sock from falling down.
- Enhanced cushioning throughout entire sock.
Material
Our materials are crafted to optimize odor resistance, durability, breathability, stretch, and moisture-wicking.
Merino Wool 82%, Nylon 13%, Polyester 3%, Lycra 2%
Care
To avoid pilling, turn socks inside out before washing. Machine wash in cool/cold water. Never bleach. Hang dry, or tumble dry on low heat. Do not iron.
If you’re not satisfied with your FITS® socks FOR ANY REASON, we’re going to work to make it right. There’s a forms to fill out and a few hoops to jump through, but we keep it simple.
Click here for the Warranty Replacement Form. If you prefer a less simple approach, please refer to the Sockholder Agreement below.
Shipping
U.S. economy shipping (arrives in 6-8 business days):
- Free shipping on orders $60 or more
- Below $60, orders ship for a flat rate of $4.95
Expedited shipping options:
- Expedited (arrives in 4-6 business days) is available for a flat rate of $9.95.
- Upgraded shipping (arrives in 2 days) is available for a flat rate of $17.95. Orders must be placed by 2 p.m. EST M-F.
International shipping is available only to Canada for a flat rate of $17.95. Customs fees may apply upon delivery.
Returns
We’re happy to honor exchanges and refunds within 30 days of purchase. Returns and exchanges from within the U.S. are 100% free and self-serve.
Unless otherwise noted, Sock Sale or Clearance sale items are not eligible for returns.
At this time we are unable to accept international returns or exchanges. We look forward to offering more options soon!
FITS Sock Size Chart
| Sock Size | Men's Shoe Size | Women's Shoe Size |
| Small | 3.5 - 5.5 | 5 - 7 |
| Medium | 6 - 8 | 7.5 - 9.5 |
| Large | 8.5 - 10 | 10 - 11.5 |
| XL | 10.5 - 12.5 | 12 - 14 |
| XXL | 13 - 15.5 | 14.5 - 16.5 |
Best. Sock. Ever.
In 2010 we set out to make the best fitting sock that could be made. And we did.
Multi-Density Cushioning
Comfort & Support
Precise Placement
Reduced Weight
Fine Gauge Merino Wool
Supple & Soft
Moisture & Odor Control
Temperature Regulating
The Y-Line*
Greater Contouring
Expands Volume
Improved Stability
Free Range Toe Box*
Personalized Shape
Range Of Motion
Won't Bunch
Tapered Compression*
Stays In-Place
Improved Circulation
Non-Constricting
Deep Heel Pocket*
Wraps Entire Heel
Supports the Foot
Prevents Blisters
Finer Fabric, Better FIT.
Whole Foot Comfort begins with premium fabric. That’s why we ground our knits with a higher quality 18.5-23.5 micron ‘fine-gauge’ merino wool. The kind typically used in luxury formal wear. This gives FITS a distinctly different, and superbly soft, feel unlike any other performance sock. Because no other sock is made like FITS.
All Day Comfort Guaranteed
If you’re not satisfied with your FITS® socks FOR ANY REASON, we’re going to work to make it right. There’s a form to fill out and a few hoops to jump through, but we keep it simple.
Reviews
- Reviews
- Questions
United States
United States United StatesHeavy Expedition Boot Socks
Love the socks. Great cushion. Help my feet to feel better throughout the day while working. Best socks.
United States
United States United StatesThese socks might be the most comfy I’ve ever owned
The quality is above anything I’ve purchased from REI Or Duluth trading or and hiking store here in Michigan. I’ve worn this brand now for almost 3 years. The sock last forever and are so soft!
United StatesNot true boot socks
These are crew socks that can be worn with hiking boots. Came here from Google from the title boot socks but boot socks are taller than crew. That's what I would have bought.
FITS®
Hello Cade, Thanks for the review! I'm sorry you aren't happy with these socks. FITS Crew height comes up to the calf and our Boot height is a mid-calf style. This may vary slightly based on body type but if you are wearing the correct size, the Boot height will come up to mid-calf. If you have any questions, please reach out to customer service at help@fitssock.com. Thanks!
United StatesGreat sock!
I purchased these specifically to wear under my tall muck boots when the weather is cold-between the warmth and the cushion, they really do the job.