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BC MicroTherm™ Down JacketBC MicroTherm™ Down JacketBC MicroTherm™ Down Jacket

BC MicroTherm™ Down Jacket

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Live Your Adventure™

Combining the microchannel construction of the MicroTherm™ Down Shirt into the lining of this fully waterproof and breathable shell rated to 20K/20K, makes it possibly the lightest, warmest waterproof jacket on earth. Patent pending.

  • 800 FILL PREMIUM EUROPEAN GOOSE DOWNDown-packed micro-channels keep you warm with minimal weight and bulk
  • DUAL-FUNCTION CHEST POCKETSProvide storage, double as heat-dumping core vents
  • INTEGRATED HOODFits easily over a ski or climbing helmet

Active Fit: Garment fits closer to the body; designed to fit over baselayers and light midlayers

  • Weather-sealed zippersEliminate need for flaps
  • Ergonomic pocketsHarness and pack compatible
  • Articulated elbowsFacilitate easy movement
  • Low-profile cuffsAdjust for snug fit
  • 100% Nylon Waterproof/Breathable 20K/20K shell; 800-fill down insulation
  • Center back length: Reg. 29 1/2", Tall 31 1/2"
  • Weight: 1 lb., 3.54 oz
  • Imported
  • Machine wash

MicroTherm™ is First Ascent's lightest, warmest down construction, which pairs high quality 800 fill with some of the narrowest channel baffling in the outdoor industry. The narrow-channel construction prevents down migration and keeps the fill more evenly distributed throughout the garment—minimizing the cold spots and filling voids that could allow body heat to escape. This elevates the overall thermal value of MicroTherm™ to an extremely high degree, meaning more warmth for the same weight, reducing overall bulk and allowing for easier layering as well as greater packability. We like to emphasize it's the warmest, lightest down we've ever made.




Peter Whittaker

"A perfect combination of warmth and protection that weighs almost nothing. This jacket thrives in the wind and cold. Bring it on!"

— Peter Whittaker

Peter Whittaker
Regular Item #:
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BC MicroTherm™ Down JacketDue to overwhelming popularity and customer response, we have refined our alpine guide team's favorite piece for Fall 2012! We’ve built a warm, insulated jacket that is lighter than most non-insulated shells on the market. This jacket is built to be the minimalist, lightweight piece that our First Ascent guide team requires in the most challenging environments where every ounce counts.Eddie Bauer - EST. 19204.033299922943115
BC MicroTherm™ Down Jacket