Play Reverse Play Icons Cross Icon Next Icon Prev Loader Navigation Icon Search Logo Shape Hamburger Pin icon Icon filter icon Group
Store Icon Find a Store
Mobile PDP loader Copy Desktop PDP loader Copy

The quiver killer of active insulation midlayers with a sleek silhouette for flexible, breathable, fitted winter warmth.

Frigid air and frosty mornings are just another part of your winter fitness routine when you pull on the Fernos Insulated Jacket. Arm yourself against the elements with Relance Primeflex, a 50 denier microfiber mechanical stretch outer that’s as hard working as it is soft to the touch. Lofty PeakFill Active Insulation traps in warmth without sacrificing breathability. The fitted silhouette stuffs easily into a pack, layers comfortably under your favorite shell, or works just fine on its own. Stash your mountain essentials in the zippered hand pockets, pull on the hood when the wind kicks up and hit the trail.

Show More
 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% Polyester, 50% Recycled 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.

Show More
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.

Show More
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
  • Fixed hood with halo adjust provides low profile protection from elements
  • YKK® center front zipper with custom Stio® zipper puller
  • YKK® zipped hand pockets to secure essentials
Weight and Measurements
  • Weight: 15.5 oz.
  • Center Back Length: 26" (size S)
Other Details
  • Heat transfer Stio® and Pinecone logos
  • Imported
Show More

How We Wear It