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Free ReturnsThe 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.
| Merino Wool | 58% |
| Nylon | 32% |
| Polyester | 7% |
| Lycra | 3% |
Designed for stay-dry breathability & performance
No uncomfortable bunching, slipping, or rubbing
Extra padding in active zones: toe, arch, & heel
Quality-made in the USA & guaranteed to last
All our socks are made with 18.5m superfine knit, suit-grade performance Merino wool.
Our custom blend of man-made fibers selected for the best breathability and fit.
United States United StatesGot 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 StatesI bought these for my son in law and he loves wearing these socks.
United StatesWore 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 StatesI 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!
United States United StatesThey are the perfect socks! They don't move and keep your feet at the right temperature! No sweating! Just the right amount of cushion!
Your sock size shouldn’t be a guessing game. Our socks range from small to double XL, but the best way to know the perfect fit for you is to match your shoe size to the chart on the left. That way, you’ll know the size you select will give you the fit and feel you expect.
Between sizes? Go with your gut, but rest assured that your socks will still fit great. If you receive your order and find yourself wishing you’d gone up or down a size, just let us know. We’ll happily send you replacements for your preferred size.
Concerned about laundry mix-ups? All FITS® socks are coordinated by color and size, based on the colors you see on the size chart. So, you won’t have to worry about mixing up your sizes with the other FITS® wearers in your home. (But stray socks mysteriously going missing in the dryer? Unfortunately, we can’t help with that.)
Sock sizes are typically measured in inches, not by your shoe size. So, a sock size 6-8 will comfortably fit someone whose feet are between six and eight inches long. However, at FITS®, we make it easy for you to choose the ideal sock size without having to measure your foot. Simply use our sock size conversion chart based on your shoe size to select the right fit for you.
To measure your foot for socks, measure the length from the heel of your foot to the tip of your longest toe. The measurement in inches correlates to your sock size. For example, if your foot is 10 inches long, a sock size 9-11 should fit you comfortably. At FITS®, you can skip this step and find your sock size based on your shoe size using our conversion chart.
The sock size conversion refers to sock size compared to shoe size. While all companies may vary slightly on which size socks to purchase based on your shoe size, you can always measure your foot to find the right fit for you.
Because sock sizes are determined by the length of your foot in inches vs. your shoe size, shoe and sock sizes differ. The FITS® sock size to shoe size conversion is as follows:
Knowing this makes it easy to choose the ideal sock size based on your shoe size without measuring your foot.
Sock sizes typically don’t correlate with age. For kids, age can be a general indicator of what size sock they’ll need, but everyone is different. An adult sock size 9-12 fits anyone whose feet are approximately nine to twelve inches long. For kids’ sock sizing, check with the company to find exact details to ensure your little one gets the perfect fit.
Got more questions about finding the perfect sock size for you? Let’s talk.
