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Darn Tough Mountaineering Micro Crew Extra Cushion

Size: M
Colour: Smoke

Size(UK): S/5-7 - M/7.5-9 - L/9.5-11 - XL/12-14 - XXL/14-16

The Darn Tough Mountaineering Micro Crew Extra Cushionsock never heads for shelter - if you're out there, this sock wants to be with you. Extra Cushion provides DT's thickest, burliest and highest density cushioning, making for super comfy sock! The Micro Crew styling provides a shorter, more concise take on the traditional crew height. Peeks just above the top of a standard hiking boot.

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 weathers and feature a specifically designed performance fit. Darn tough are so confident you'll love their socks they provide a money back guarantee if they aren't the best all-round socks you've ever owned!

What The Rock+Run Team Say

"I Bought these socks to combat cold feet cycling in the Lakes wet winter. They served their purpose and then some, having kept my feet warm well below 0°C on rides lasting several hours. They’re warm with a snug, cosy fit. Impressively they look and feel nearly new after a dozen or so trips through the wash caked in mud, grit and other bridleway debris. I’ll definitely be looking at the over calf version for use in winter mountaineering boots too." - Matt


  • Performance Fit: No slipping, no bunching, and no blisters.
  • Fine Gauge Knitting: Unprecedented durability and our unique “put it on, forget it’s on” feel.
  • Fast Action Wicking: Pulls moisture away from skin. Fast drying.
  • All Weather Performance: Cool in the summer, warm in the winter.
  • Naturally Antimicrobial: Repels bacteria and odour.
  • Merino Wool: The ultimate fibre for breathability and comfort in all conditions.


  • Extra Cushion: DT's thickest, burliest and highest density cushioning makes for a big, bad monster of a sock.
  • Micro Crew Height: A shorter, more concise take on the traditional crew height. Peeks just above the top of a standard hiking boot.


  • 70% Merino Wool 28% Nylon 2% Lycra® Spandex

Sizing (UK)

  • S/5-7 - M/7.5-9 - L/9.5-11 - XL/12-14 - XXL/14-16

    Personal Shopping - By Appointment

    Would you like to try on some climbing shoes, running 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.

    Customer Reviews

    Based on 1 review
    Matt S.
    Great mountain biking sock

    I've been using these through the winter as my go to sock for cycling. On the road bike they're good, but out on my mountain bike where they end up soaking wet most days, they've been great. I've used them from about 8 to -6oc and they've beaten the worst of the cold every time. Having been through the wash at least a dozen times, often with grass, mud and twigs still attached these socks still look like new.