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With its Primaloft Eco insulation and Tropozone waterproof breathable fabric, the Sierra Designs Prima Fusion Insulated Jacket is ready to tackle your next high-alpine adventure. The Tropozone 3L fabric features a PU membrane to protect against rain, falling snow, and high-speed winds, while a DWR coating encourages water and melting snow to bead up on the fabrics surface without affecting the garment’s overall breathability. Sierra Designs also included a touch of insulation for extra warmth.

  • Fully taped seams and water-resistant front zipper prevent the elements from sneaking in
  • Primaloft Eco insulation traps in warmth and is sourced from recycled materials
  • Core Comfort Technology bonds insulation to strategic points for increased comfort, an enhanced range of motion, and a sleek overall appearance
  • Fusionic Tech uses a stitchless, heat-bonding technique to join fabric pieces, which results in stronger, cleaner-looking seams
  • Underarm vents lend airflow and increase evaporation when you work up a sweat

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Sierra Designs Prima Fusion Insulated Jacket - Men's

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Here's what others have to say...

5 5

Great Shell

This is my favorite jacket with just a little insulation in the chest and back . zip pits is the jacket to go for climbing mountain biking in winter etc cant beat the price for such a nice looking and functional Jacket.

is the hood helmet compatable and...

is the hood helmet compatable and adjustable?

The hood is helmet compatible, and I believe that it does have adjusters on the inside of the hood, and on the back, though I'm not 100% on that. It would be very surprising if SD didn't put them in there though, they're kinda important.