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Karuishi® stretch fleece creates a smooth, resilient surface and a warm, fleecy interior for a half zip that wicks and breathes mile after grinding mile.

When pushing the pace during mountain workouts, our wicking, breathable and high-stretch half zip maintains comfort mile after grinding mile. Built with premium Karuishi® stretch fleece, the self-regulating material features integrated four-way stretch and a circular knit construction that creates both a smooth, resilient surface and a warm, fleecy interior. Integrated thumbholes keep arms down during reaching or stretching, while an inner security pocket stashes a key or a card when hitting the trail. Now with an updated fit in the sleeves for greater comfort.

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Karuishi® Stretch Circular Knit Fleece, 44% Nylon, 43% Polyester, 13% Polyurethane, 156 g/m2

Karuishi® is a technical fleece concept based on lightweight warmth and durability. A special 2-layer knitted construction creates an abrasion-resistant, anti-pilling face and a lofty, brushed next-to-skin backing. The end result is a high volume, lightweight insulator that breathes exceptionally well.

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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
  • Stretch nylon blend fleece offers comfort and durability
  • Knit structure with brushed back offers warmth and breathability
  • Underarm gusset offers full range of motion
  • Flatlock seams maximize comfort and ease of layering
  • Interior stash pocket on the inside back near the waist
  • YKK® reverse coil zipper at center front and interior pocket
  • Kissing welt interior zipper finish for added comfort next to skin
Fit and Measurements
  • Trim Fit: A slim design with minimal bulk that fits close to the body
  • Center Back Length: 25 1/2" (size S)
  • Weight: 6.7 oz.
Other Details
  • Heat transfer Stio® and Pinecone logos
  • Imported
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