CLOUDLINE
Men's Merino Wool 1/4 Top Running Sock 3-Pack - Ultralight
Men's Merino Wool 1/4 Top Running Sock 3-Pack - Ultralight
1/4 topUltralightBest for trail runs and light hikes
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- Lifetime guarantee, no time limit
- Knit in Fort Payne, Alabama
- RWS certified merino wool
Men's Ultralight Merino Wool Running Socks - ¼ Top 3-Pack
Big days on the trail call for men's merino wool running socks that keep you cool, dry, and moving fast. Our men's ultralight ¼ top running socks are ideal for warm-weather trail runs, ultramarathons, and light-and-fast hikes, now bundled in a 3-pack so you always have a fresh pair ready to go.
Cloudline's ultra-soft merino wool is naturally breathable, moisture-wicking, and odor-resistant, keeping your feet fresh mile after mile without weighing you down. The ultralight construction delivers a barely-there feel underfoot, while the ¼ top ankle height keeps trail debris out so you can stay focused on the run. A precision fit means less rubbing and slipping, which helps prevent blisters from the first step to the finish line.
Stock up with our 3-pack of men's ultralight trail running socks and always be ready for your next adventure. Perfect for trail running, ultramarathons, warm weather training, and hiking.
- 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 | Small Youth 3 - 5.5 | 2.5 - 4.5 | 35 - 37.5 | 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" |

Collapsible content
SOCK FEATURES
SOCK DETAILS
CARE INSTRUCTIONS
Turn inside out and machine wash cold or warm with like colors. Skip bleach and fabric softener. Tumble dry low to warm or line dry, and never iron. Read the full care guide
LIFETIME GUARANTEE
Every Cloudline sock is covered for life, with no time limit. If you wear out a pair, our team will send you a code for a free replacement. You just pay shipping, or it's free on orders over $75. How the guarantee works
Frequently Asked Questions
Compare running sock cushion levels
Every pair is knit in Fort Payne, Alabama from the same yarn: 80% RWS certified merino and 20% nylon for durability. Fiber content shifts with the cushion, reinforcement and stretch, so pick the padding that fits your shoes and season.
Ultralight
- Cushion
- No cushion, our thinnest knit
- Warmth
- Coolest
- Best for
- Hot days, race day and snug shoes
- Fiber content
- 59% merino, 36% nylon, 5% spandex
$ 18.99 a pair
Light Cushion
- Cushion
- Light padding underfoot
- Warmth
- Balanced
- Best for
- Everyday training on road or trail
- Fiber content
- 63% merino, 31% nylon, 6% spandex
$ 19.99 a pair
Shop Light CushionMedium Cushion
- Cushion
- Medium padding underfoot, ultralight upper
- Warmth
- Warmest
- Best for
- Long runs and extra protection underfoot
- Fiber content
- 63% merino, 33% nylon, 4% spandex
$ 20.99 a pair
Shop Medium CushionStill deciding? Read our cushion guide.
Wear a hole in them. We'll replace them. For life.
No time limit. Holes, worn-out heels and toes, even the pair the dog got to. It covers every Cloudline sock.
How the guarantee works- 1Wear them hardHike, run, work and travel in them.
- 2Send us a quick messageYour order number, or the name and email you ordered with.
- 3Get your replacement codeThe replacement pair is free. Pay shipping, or add a few pairs and ship free over $75.

Knit in the Sock Capital of the World
Every Cloudline sock is knit in Fort Payne, Alabama, the town that earned the name Sock Capital of the World. We design and trail test them in Seattle, where coastal trails, rainforest and glacier peaks are all a day trip away.
Why merino wool socks?
Cool in heat, warm in cold
Merino adapts to your effort and the weather, so one sock works from desert miles to winter trails.
Dry feet, fewer blisters
It wicks sweat away from skin, which is why it works for sweaty feet and long days in boots.
Naturally odor resistant
No chemicals or metals added. Kick your shoes off at the end of the day with confidence.
Soft, not itchy
Fine-gauge merino yarn feels nothing like the scratchy wool socks you remember.
Best-selling men's merino wool socks
The pairs our customers reorder most.
Best seller
Best seller
Runner favorite
15 to 20 mmHg