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When the day calls for your highest performing midlayer, reach for the Fernos. A Relance™️ Primeflex shell and PeakFill™️ Active Insulation maximize warmth and breathability and the roomy yet athletic fit caters to your freedom of movement.

Parking lot to peak, first chair to last, sunup to sundown—chasing that mountain magic means putting in the time in all conditions. Our Fernos Insulated Jacket is just that. This choice active insulation midlayer is equipped for high-output pursuits, working just as well under a shell as it does on its own. A Relance™ Primeflex outer combines with PeakFill™ Active Insulation and 50% recycled polyester for max breathability and warmth. Stretch panels along the sides and sleeves allow for freedom of movement, while a stretch fixed hood with halo adjust provides low-profile protection from the elements.

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 Image Relance™ Primeflex
 Image PeakFill™ Active Insulation
Shell and Lining

Relance Primeflex™, 50 Denier Microfiber Mechanical Stretch Plainweave, 100% Polyester, 94g/m2 with 80/20 DWR Finish

Relance™ Primeflex 100% polyester microfiber offers better drape and wicking than that of normal polyester fibers. This fabric features a soft hand, comfortable stretch, wind resistance, and excellent resiliency and strength.


PeakFill™ Active Insulation, 50% Recycled Polyester, 50% Polyester, 40g/m2

Our PeakFill™ Active proprietary insulation balances warmth and breathability to maintain lasting athletic comfort across the entire conditional range. Designed to keep core temps regulated, the synthetic fiber fill draws on a spiral filament structure to enable greater stretch, faster recovery and quicker dry times than traditional lofted insulation whether rolling slow at valley level or working hard up in the alpine.

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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
  • PeakFill™ Active Insulated layer with stretch panels along sides and sleeves for range of motion
  • Microfiber shell and lining with soft hand and mechanical stretch
Hood and Pockets
  • Fixed hood with halo adjust provides low profile protection from elements
  • YKK® zipped chest and hand pockets to secure essentials
  • YKK® center front zipper with Custom Stio® zipper puller
Fit and Measurements
  • Regular Fit: A casually shaped design that’s not too tight and not too baggy
  • Center Back Length: 28 1/2" (Size M)
  • Weight: 17.8 oz.
Other Details
  • Heat Transfer Stio® and Pinecone logos
  • Imported
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How We Wear It