Performance Trail
The Performance Trail looks different for a reason. The high cuff is a built-in scree-guard that helps keep out the trail while you're trail running. Below the cuff is a vented lower that increases breathability during highly aerobic activities. Similar to the Light Performance trail but designed in a medium weight for colder weather.
Engineered for Whole Foot Comfort
- Knit with 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.
- Cushion zones in the heel, toe and arch.
Material
Our materials are crafted to optimize odor resistance, durability, breathability, stretch, and moisture-wicking.
Merino Wool 58%, Nylon 32%, Polyester 7%, Nylon 3%
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 StatesFITS Performance Trail socks
These are GREAT hiking socks! I do about 5K each morning, and I am impressed by these socks, and will order more! I love these!
United StatesGreat purchase
I have had a few pairs of these and just added two more to the collection. Great for trail running and hikes.
United States United States United StatesAwesome
Got these for hiking, ended up using them for everyday wear at work and more. Comfy and supportive, wash well, a little shrinkage after in the dryer.
United StatesBest socks
I bought these for my son in law and he loves wearing these socks.
United StatesGood but not SW it DT
Wore fits on a section hike of the AT. Also wore my DT socks. Fits did not perform as well as the DT socks. Foot slid and moved too much I trail runners.
United StatesPerformance Trail Quarter
I bought one pair these for my husband as a trial to see he would like them. He loves the length and the special performance features so much that I ordered 10 pairs for him to wear everyday. As a family, we all love wearing Fits socks and I love how much longer they last than those we’ve worn in the past!