Darn Tough RFL OTC Ultra Light Men's Sock

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Darn Tough Mens RFL OTC Ultra-light Sock

Tight ski boots and cold feet have plagued skiers for years; suffer no more and get a pair of Darn Tough's RFL OTC Ultra-light Socks. The RFL is really freaking light - hence the name - and is the perfect sock for skiers who have a snug performance or race fitting ski boot. For the 2021 season Darn Tough redesigned the RFL OTC Ultra-light Socks to increase that incredibly snug hold, from the foot all the way up the calf with more Nylon and Lycra? Spandex. Darn Tough socks do a superior job at keeping your feet warm, because of the merino wool functionality. Most people don't realize that feet still sweat when they are cold, and make those tootsies colder. The merino fiber pulls moisture away from the foot to help regulate foot temperature. If it helps keep the sheep warm, it will keep you warm as well. Merino is also naturally antimicrobial which will help cut down that rank foot smell that can permeate boot liners. Darn Tough goes out of their way to get the highest quality merino wool, so you'll never experience itchiness in your RFLs. You can feel proud purchasing your socks knowing that they're made locally in Vermont, but you can also rest assured if anything happens to your socks Darn Tough has you covered because these socks are unconditionally guaranteed for life. That means, no matter the age of your sock, Darn Tough will replace socks that have tears, holes, cause blisters, shrink, lose elasticity, etc. With a guarantee like that the RFL OTC Ultra-light Socks will become your most coveted sock.


  • Over The Calf
  • Performance Fit
  • Fine Gauge Knitting
  • Fast Action Wicking
  • All Weather Performance
  • Naturally Antimicrobial
  • Guaranteed For Life: No strings. No conditions. For life.
  • Merino Wool
  • True Seamless™
  • 60% Nylon 35% Merino Wool 5% Lycra? Spandex
Darn Tough RFL OTC Ultra Light Men's Sock
How do you size Darn Tough socks I wear a 304mm snug fitting boot?
Question by: Glenn Herbert on Dec 15, 2021, 2:09 PM
Hi Glen,

If you ago to Darn Tough web site and scroll down to the bottom on the main page you will find a sizing chart link.


Answer by: Dave Hatoff on Dec 15, 2021, 3:46 PM

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