5X040ZZ-S
| Sock Size | US Men | US Women |
| Small (S) | 3 - 6.5 | 4 - 7.5 |
| Medium (M) | 7 - 9.5 | 8 - 10.5 |
| Large (L) | 10 - 11.5 | 41579 |
| X-Large (XL) | 12 - 15 | 13.5 - 16.5 |
| Sock Size | US Men | US Women |
| Small/Medium (S/M) | 4 - 9.5 | 5 - 10.5 |
| Large/X-Large (L/XL) | 10 - 13 | 11 - 14 |
Coal / S
Made in USA Moisture Wicking
Lifetime Performance Guarantee
Swiftwick · Made in the USA
You're looking at the Swiftwick Flite XT Trail Mid-Crew Socks.
Firm compression. Moisture-wicking fibers. A seamless toe you forget is there. Every pair is knit in the USA to hold its fit on the longest days — and backed for as long as you own it.
Lifetime Performance Guarantee
If your Swiftwick socks ever lose their fit, cushion, or durability, we'll replace them. That's the promise we make on every pair — no fine print, no expiry.
GTE·5X040ZZ-S·SWIFTWICK-USA
How a claim works
Keep it
Keep your order confirmation or receipt.
Tell us
Reach out with the pair and what went wrong.
We replace
We send a fresh pair. That's it.
Engineered to earn it
Fit
Managed compression supports the arch and locks the sock in place — no slipping, no bunching, mile after mile.
Feel
Performance fibers pull sweat away to keep feet dry and blister-free on the longest efforts.
Build
A seamless toe and precision knit, made in the USA to a standard we stand behind for life.
