REI Co-op Swiftland TT Run Crew Socks
Go the distance in comfort. Our REI Co-op Swiftland TT Run Crew socks are made with COOLMAX® EcoMade recycled polyester for cooler, drier feet on technical trail runs.
- Crew height (9 in.) fends off dirt and grime
- Breathable COOLMAX® EcoMade recycled polyester helps with moisture management through long runs
- Mesh on the tops of the feet provides breathability
- Spandex yarn wraps feet for arch support and provides all-day comfort and fit
- Reinforced impact zones at the heel and toe for durability
- Seamless toe prevents chafing
- Machine wash inside out in cold or warm water; do not use bleach or fabric softener; tumble dry on low
- REI Co-op brand is certified to The Climate Label; we actively fund efforts to reduce carbon emissions across our business and support climate projects around the world
- Made in USA with imported and domestic yarns
Made in USA.
View the REI Co-op Swiftland Product LineView all REI Co-op Men's Running Socks| Best Use | Running Trail Running |
|---|---|
| Fabric | Asphalt: 58% COOLMAX EcoMade recycled polyester/38% nylon/4% LYCRA spandex; Wild River Magenta Twilight: 62% COOLMAX EcoMade recycled polyester/34% nylon/4% LYCRA spandex |
| Sock Height | Crew |
| Sock Cushioning | Ultralight Cushioning |
| Moisture Wicking | Yes |
| Gender | Unisex |
| Sustainability | Contains recycled materials From a Climate Label Certified brand |
Fits slightly large based on reviews
| S | M | L | XL | S/M | L/XL | |
|---|---|---|---|---|---|---|
| U.S. Men's | 5.5-8.5 | 9-12 | 12.5-14 | 5.5-8.5 | 9-14 | |
| U.S. Women's | 4-6.5 | 7-9.5 | 10-12.5 | 4-9.5 | 10-12.5 |
Sizing Notes
For socks, please use shoe size.
Better gear is built together
From feedback to field testing, all of our gear is dialed-in by REI Co-op members. Their adventures informed every stitch and detail—making for better, longer-lasting gear.


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Great socks - exceeded my expectations!
I just bought these socks & took them out for a spin on a trail run today. Excellent quality, great fit, and super comfortable. They've just gone on the birthday list and my Christmas 2024 list!
Shiny feet!
Love this socks!, perfect for winter my feet never felt so warm and the skin looks shiny instead of dry.
Working well for winter runs
Good cushioning and some warmth, without feeling too bulky.
Good socks
Comfortable socks and fun design. Wear well for running
Great socks
Great socks, warm and comfy feet.

