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Darn Tough Men's Bolt Micro Crew Ultra-Lightweight Running Sock

Colour: Dark Teal
Dark Teal
Size: L

Size: M: UK 7.5-9 / L: UK 9.5-11.5 / XL: UK 12-14

Pounding the city streets or clocking brag-worthy mountain PRs, there's no denying the vintage-inspired van stripes of the Darn Tough Bolt. Peep under the hood and you'll find ultra-lightweight Merino Wool, plus a redesigned, softly-smooth upper with arch support. We could call the cushioning underfoot "shocks" or "shockingly comfy" – either works. When you've got power and panache, you don't need to choose between them.

Darn Tough are an American company specialising in outdoor sports socks, primarily manufactured from ethically sourced Merino wool. Their socks are entirely constructed within their Northfield, Vermont factory and are renowned for being the hardest-wearing outdoor socks on the market. As well as the near-legendary durability, Darn Tough Socks provide amazing levels of comfort in all weather and feature a specifically designed performance fit. Darn Tough is so confident you'll love their socks that they provide a money-back guarantee if they aren't the best all-round socks you've ever owned!


  • Men's micro crew socks average 8.5 in. from heel to cuff - expect them to rise about 6 in. above a running sneaker.
  • A performance fit means no slipping, no bunching, no blisters. Here's to focusing on your run and not your feet.
  • Arch support alleviates foot fatigue and bunching for long-running comfort with zero slippage.
  • Flex windows mean less material where your foot needs to move the most so nothing interferes with your stride.
  • Runners enjoy Merino Wool's ability to dry quickly and move excess heat and moisture away from feet.
  • The lowest profile, ultra-lightweight yarns create zero bulk, zero itch socks that feel like a second skin.
  • The “still” in Still Made in Vermont, USA is personal. Darn Tough knit all their socks at the VT-based Mills.
  • Unconditionally Guaranteed for Life - if these aren’t the longest lasting socks you’ve ever owned, return them for another pair.
    • Cushion: These cushioned micro crew socks feature soft terry loops under the foot for lasting rebound while trail running.


    • 49% Merino Wool, 47% Nylon, 4% Lycra Spandex

      Personal Shopping - By Appointment

      Would you like to try on some climbing shoes or mountain boots for size before you make your purchase? If so, then why not book an appointment with us today! We can offer you a bespoke one-on-one shopping experience with one of our experienced staff members.