All Shop By Weight Ultra-Lightweight

In the spirit of running and using everything you got to hit your goal, we’ve knit running socks that do the same. These limited no show socks are no different from what we have in moisture-wicking, blister-resistant, ultralight run socks, already. But they make use of yarns in our overstock inventory – raw materials with nowhere to go. Except on your feet, and a lifetime of miles ahead. Unconditionally guaranteed for life, just not guaranteed to ever be knit again.

Breathe easy. Bringing together smooth Merino Wool feel, next-to-skin fit, flex and fatigue-zapping arch support, and targeted venting — the ultra-lightweight RFL is the sock experience your hard-charging feet have been dying for, lap after lap.

Get back to basics with this black and white sock bundle – quarter-height, ultra-light, and a fit just right you’ll forget they’re on your feet.

Runners know what it’s like to be up at the crack of dawn. Inspired by the shape of mountains, the Horizon Micro Crew is sure to keep up with you as you clock miles and minutes spent chasing daylight. With warm hues that recreate the look of sunset skies, this Ultra-Lightweight knit is the perfect training partner that will remind you of life’s infinite possibilities.

Off the track and into a PR, the retro-styled Men’s Grit run sock tips its headband to baton-passing champions of the past and wins the future with Merino Wool performance. Built with targeted flex zones and a non-slip fit that runners love, this sock’s always got your back. From single track scrambles to road sprints, the Grit is what you need to push through to the finish line.

The RFL focuses on the important stuff: durability, breathable warmth, and ultra-lightweight fit. It's the spot-on choice for serious skiers and riders. This go-to women's Snow sock features a reinforced heel that strengthens the sock without needing a dip in the river Styx.

When stacking vert is the goal, you’ll reach for this Micro Crew every time. Lightweight and fast with a yarn’s worth of mountain views, the new Men’s Vert is the epitome of functionality – mixed with fearless, long-lasting style.

You’re going the distance, you’re going for speed. And if you’re running the anchor lap, this is the sock you’ll need. Knit with Lightweight Merino Wool, the Relay helps you float, sprint, and attack the outside lane without ever fumbling the baton. And with added durability in the heel and foot, it’ll keep you running laps around the competition.

Feeling unmotivated? You need the Mirnavated. Inspired by our own barrier breaking athlete Mirna Valerio, this colorful Ultra-Lightweight Run sock – sales from which support the non-profit Come Alive Outside – redefines what it means to give back.

When you put fun first, the serious stuff like fitness and form will follow. That’s why we made a sock with toucans holding two cans so you too can have more fun when you run. From treadmill to trail, this Ultra-Lightweight Micro Crew is built for everyday athletes who simply need a smart, comfortable, and cushioned sock to absorb the impact of bumpy terrain and bad jokes along the way.

No, it’s not a mirage – that’s just the magical, moisture-wicking properties of Merino Wool you’re seeing. Ultra-Lightweight and undeniably tough, this long-lasting knit is guaranteed to take you places you never thought you'd reach.

Ski and ride with all the feels. Slip into the synthetic version of our lightest women’s snowboard and ski sock for a seamless and dreamy connection to your boots and all the adventures you’re riding on.

Our premier RFL next-to-skin fit and feel, knit from lightweight synthetic THERMOLITE®. Enhanced boot connection, breathability and Darn Tough durability? Check, check and check.

As if the bright Merino stripes on this colorful Micro Crew weren’t rousing enough, just wait until you slip it on. Reengineered for top-line, trail-ready performance, the throwback Sierra Stripe stacks durability on top of comfort with USA-made quality that’s fit to help you conquer any climb, anywhere.

The only sock bundle that runs the gamut of style and function. Whether you’re bolting to the finish line or cruising towards a new PR, you can count on these socks to help you win the race and every day after.