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Trail sock comfort is key when logging high miles at high elevation.

We’ve learned not to underestimate the power of a comfortable hiking sock when logging high miles or high traverses at high elevation. Our fresh take on the classic pair starts with a merino wool/nylon blend for thermally regulated comfort then adds smooth, seamless toe construction, a cushioned footbed and comfort compression to reduce fatigue. Reinforced construction ensures they outlast long loops, extended thru-hikes and life-list foreign circuits.

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Let The Outside In® Stripe

63% Merino Wool, 34% Nylon, 3% LYCRA® Spandex

Pinecone Stripe

62% Merino Wool, 35% Nylon, 3% LYCRA® Spandex

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As caretakers of the mountain life, we recognize our responsibility to support organizations and people who share our vision to drive positive change for people and the planet. We’re proud to partner with some tremendous organizations in their missions to responsibly advance outdoor recreation and protect our wild surroundings.


We are committed to building garments that are durable, timeless and continue to perform season after season. Over 50% of our product line incorporates preferred materials, which include organic cotton, recycled materials and responsibly-sourced down. We are committed to growing our preferred materials usage to 75% by 2025 and to completely eliminating PFAS from our garments by 2025.

Stio Second Turn®

Our apparel is built to last. As a part of our efforts to reduce waste and keep more gear in the mountains where it belongs, our home-grown gear renewal program allows previously-used items to be traded in, cleaned, repaired and circulated back into use.

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Fabric Details
  • LYCRA® top to toe
  • Flat knit leg and top of foot
  • Arch support
  • Reinforced foot bottom, high heel, heel & toe
  • Seamless toe closure
  • Full cushion at foot bottom, high heel, heel & toe
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