Introducing the latest addition to TREW’s Insulated Collection: The Kooshin


While everyone else is hanging their stockings by the chimney with care, TREW is releasing their newest member of the insulated family- the Kooshin. Inspired by the über-popular Patagonia Nano-Air, but with upgraded fabrics and a wallet-friendly price, the new Kooshin is the layer you’ll never want to take off…a good 10 months of the year.

The Kooshin’s revolutionary 3DeFX+ construction is so incredibly warm, comfortable and stretchy you’ll never want to take off, and it’s so breathable that you won’t have to. The Kooshin jacket’s ability to go from fast-paced outdoor activities to chilled-out comfort makes it the best kind of oxymoron, like a trail-savvy cattle dog with the temperament of a baby manatee. Convenient hand-warmer pockets and a single Napoleon chest pocket add functional storage to one of the most versatile insulation pieces you’ll ever own.

3DeFX+ Insulation

The innovative secret behind the Kooshin’s three-layer construction, a sandwich of breathable, stretchy shell and liner fabrics surrounding 3DeFX+, a three-dimensional synthetic insulation with stretch. 3DeFX+ is a 4-way Stretch Polyester Insulation composed of four types of spiraling, hollow-core polyester yarns. This formulation provides a lightweight, lofty insulation with incredible flexibility and stretchability.


The shell fabric on our 3deFX+ garments is a durable stretch woven nylon with a ripstop weave. The fabric is left open and breathable, without a cire finish or acrylic coating traditionally applied on most insulated jackets. As a result, the outer fabric remains suppler, silent, and stretchy. For extra protection from the elements, we add a C6 DWR finish to repel moisture. 


The 3DeFX+ Liner fabric is a plain-weave nylon with an incredibly soft and stretchy hand. The smooth finish glides over your baselayer and feels incredible next-to-skin. There is no quilting on the liner so it retains maximum stretchability as the body moves during activity.


  • 3DeFX+

- Stretch-woven ripstop shell fabric

- Breathable and stretchy insulation

- Stretch-woven inner lining

- Strategic quilting keeps insulation in place

  • Zip handwarmer pockets
  • Zip chest pocket
  • High draft-cutting collar
  • Hidden elastic cuffs

MSRP: $199

PR Contact: Inside Out PR

Erin Brosterhous