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The clue’s in the name — the Fastpack was built for moving light and covering serious ground. It’s a dialled-down, trail-ready version of Darn Tough’s most beloved hiking sock, trusted by thru-hikers, wildcampers and weekend warriors alike. With lightweight cushioning underfoot, fatigue-fighting arch support, and extended Achilles protection, it’s engineered for comfort on the move — whether you’re lacing up at first light or chasing the last of the daylight back to camp. A breathable merino wool blend keeps feet cool, dry, and odour-free, while the micro crew height stays boot-friendly and grit-proof. And with a dapper stripe that nods to the sock’s performance pedigree, it doesn’t just feel good — it looks sharp too.
| Sock Size | UK | Euro | Men US |
|---|---|---|---|
| M | 7.5-9 | 41-42 | 8-9.5 |
| L | 9.5-11.5 | 43-45 | 10-12 |
| XL | 12-14 | 46-49 | 12.5-14.5 |
Darn Tough socks are covered by an unconditional lifetime guarantee. If their socks are not the most comfortable, durable and best fitting socks you have ever owned, return them for another pair. It's that simple.
If you do want to return a pair, contact us and we'll get that sorted for you.
The clue’s in the name — the Fastpack was built for moving light and covering serious ground. It’s a dialled-down, trail-ready version of Darn Tough’s most beloved hiking sock, trusted by thru-hikers, wildcampers and weekend warriors alike. With lightweight cushioning underfoot, fatigue-fighting arch support, and extended Achilles protection, it’s engineered for comfort on the move — whether you’re lacing up at first light or chasing the last of the daylight back to camp. A breathable merino wool blend keeps feet cool, dry, and odour-free, while the micro crew height stays boot-friendly and grit-proof. And with a dapper stripe that nods to the sock’s performance pedigree, it doesn’t just feel good — it looks sharp too.
| Sock Size | UK | Euro | Men US |
|---|---|---|---|
| M | 7.5-9 | 41-42 | 8-9.5 |
| L | 9.5-11.5 | 43-45 | 10-12 |
| XL | 12-14 | 46-49 | 12.5-14.5 |
Darn Tough socks are covered by an unconditional lifetime guarantee. If their socks are not the most comfortable, durable and best fitting socks you have ever owned, return them for another pair. It's that simple.
If you do want to return a pair, contact us and we'll get that sorted for you.
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