CLOUDLINE
1/4 Top Running Sock - Ultralight
1/4 Top Running Sock - Ultralight
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These ¼ Top Ultralight Running Socks are perfect for warm-weather trail runs. Our lightest merino wool sock lets your feet breathe, even when they’re climbing mountains or running ultras. These socks sit right above your ankle — the perfect height for keeping dirt, pebbles, and any other pesky debris out. Trail running is about enjoying the adventure, and that’s a whole lot easier with a smooth, blister-free fit.
Free USA Shipping on Orders Over $50
Covered by the Cloudline Lifetime Guarantee
This style is also available on Amazon
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- Free Exchnages and Returns
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
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
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
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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.
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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.