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Light, fast and technical, Polartec®️ Alpha®️ insulation cuts a cold morning chill yet breathes well during fast-paced activity.

Matched to constant training—for trips, tours or ultras—our breathable active insulator is light, fast and technical. Polartec® Alpha® Active 60g insulation cuts a cold-morning chill yet breathes deeply and keeps the interior dry during high-output activity. The stretch gusseted underarm enables free-ranging mobility, while sleek construction detailing gives it a superfast feel on the trail or on the skintrack. A quick-draw hood cinches down fast when storms descend and a ripstop shell sheds light weather with a lasting DWR Finish. Key pockets stow critical items.

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 Image Meridian

Meridian™ AP, Stretch Mini-Ripstop, 100% Nylon, 20 denier, 49 g/m2 with DWR Finish

Meridian™ AP is a 20 denier Mini-Ripstop Nylon with mechanical stretch by construction. A DWR finish makes this fabric both highly water resistant and extremely breathable while maintaining excellent wind resistance.


Polartec® Alpha® Active Insulation, Synthetic Knit Insulation, 54% Recycled Polyester 46% Polyester, 60g/m2

Alpha® is a 100% polyester knit active insulation that eliminates the need to shed layers while on the move. Designed to regulate core body temp during dynamic and static activities, Alpha® technology keeps moisture vapor moving freely through the fabric, increasing the overall air exchange and speeding up dry times. A DWR coating provides water resistance, increasing this fabric's performance in the most challenging environments.

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Climate Neutral

We completely offset the footprint of each order through our commitment to being climate neutral. As part of our mission we value being good caretakers of the mountain life and protecting the places where we play.


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.

Trade-In Program

We believe a circular commerce system will design out waste and pollution, allowing for used clothing to be renewed and put back into use. Stio Second Turn™️ is our gear renewal program that allows customers to trade in and shop used apparel.

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Fabric Details
  • Lightweight, packable insulated mid-layer
  • Gusseted underarms without insulation for mobility and breathability
  • Stretch woven cuff for comfort and performance fit
  • Slight drop hem with dual hem adjust
Hood and Pockets
  • Adjustable low profile hood with structured hood brim for customized fit
  • Chest and hand pockets with hidden zippers
  • YKK® Vislon® front zipper
  • Stio® Custom zipper pulls
Weight and Measurements
  • Weight: 10.6 oz.
  • Center Back Length: 26" (size S)
Other Details
  • Reflective Stio® and Pinecone logos for visibility
  • Imported
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How We Wear It