CLOUDLINE
1/4 Top Running Sock - Ultralight
1/4 Top Running Sock - Ultralight
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Women's Ultralight Merino Wool Running Socks – ¼ Top
There's something about trail running that keeps you going for miles — the quiet, the scenery, the adventure. But no matter how beautiful your surroundings, nothing keeps you moving like a breathable, barely-there sock. Our women's ultralight merino wool running socks are the perfect companion for warm-weather trail runs and beyond.
Cloudline's merino wool is naturally moisture-wicking and odor-resistant, keeping your feet cool, dry, and fresh mile after mile. The ultralight construction delivers a forget-it's-there feel underfoot, while the ¼ top ankle height keeps trail debris out so you can stay focused on the run. A smooth, precision fit means no rubbing, no slipping, and no blisters — from the first step to the finish line.
Perfect for trail running, warm weather training, hiking, and ultramarathons — these women's ultralight running socks are built to let the miles fly by.
Free USA Shipping on Orders Over $75
Covered by the Cloudline Lifetime Guarantee
- Compostable Shipping Materials
- Carbon Neutral Shipping
- Free Exchanges and Returns

Size Guides
Sock Size Guides
| WOMEN'S | US | UK | Europe | CM |
| Small | 4 - 6.5 | 2 - 4.5 | 35 - 37 | 20.5 - 23 |
| Medium | 7 - 9.5 | 5 - 7.5 | 38 - 40 | 23.5 - 25.5 |
| Large | 10 -12.5 | 8 - 10.5 | 41 - 45 | 26 - 28.5 |
| X-Large | 13 - 15 | 11 - 13.5 | 46 - 49 | 29 - 31 |
| MEN'S | US | UK | Europe | CM |
| Small | N/A | N/A | N/A | 20.5 - 23 |
| Medium | 6 - 8.5 | 5.5 - 8 | 39 - 41 | 23.5 - 25.5 |
| Large | 9 -11.5 | 8.5 - 11 | 42 - 44 | 26 - 28.5 |
| X-Large | 12 - 14.5 | 11.5 - 14 | 45 - 47 | 29 - 31 |
| KID'S | SIZE | AGE | INCHES | CM |
| X-Small | 6T - 8.5T | 1.5- 3.5 | 5 - 6 | 12.7 - 15.24 |
| Small | 9T - 11.5T | 3.5 - 5.5 | 6 - 7 | 15.25 - 17.78 |
| Medium | 12T -2.5Y | 5.5 - 8.5 | 7 - 8 | 17.79 - 20.32 |
Base Layer Size Guides
| WOMEN'S | X-Small | Small | Medium | Large |
| Chest | 16 5/8" | 17 5/8" | 18 5/8" | 19 5/8" |
| Waist | 14 3/8" | 14 3/4" | 15 1/8" | 15 1/2" |
| Length | 24 7/8" | 25 1/2" | 26 1/8" | 26 3/4" |
| MEN'S | Small | Medium | Large | X-Large |
| Chest | 19 3/8" | 20 3/8" | 21 3/8" | 22 7/8" |
| Waist | 18 5/8" | 19 5/8" | 20 5/8" | 22 1/8" |
| Length | 28" | 28 5/8" | 29 1/4" | 29 7/8" |

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SOCK FEATURES
SOCK DETAILS
LIFETIME GUARANTEE
If you wear out a pair of Cloudline socks our team is here to get them replaced with our simple warranty process so you can get back on the trail.
Merino You Can Feel Good About
Cloudline socks are knit exclusively with premium merino wool certified by the Responsible Wool Standard. This ensures our wool comes from farms that take a responsible approach to land management, and follow the principles of the Five Freedoms for Farm Animals.