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MicroTherm® Down VestMicroTherm® Down Vest

MicroTherm® Down Vest

First Ascent
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Live Your Adventure™

For times when a vest provides all the extra warmth you need, our lightweight down favorite is ideal. Premium Goose Down traps core heat more efficiently than any other insulation, and the streamlined design layers without bulk under a shell, or crams into the smallest corner of a pack or bag when not in use. New recycled shell fabric reduces consumption and is windproof and water-resistant. Our StormRepel® durable water-repellent (DWR) finish sheds precip.

  • 700-fill Premium Goose DownDown-packed micro-channels keep you warm without bulk
  • Windproof, water-repellent shellLightweight 1.2 oz 20-denier recycled ripstop polyester with StormRepel® DWR finish
  • Side Stretch PanelsIncrease breathability, improve range of motion, and allow for a trim, athletic fit
  • Lightweight and PackableFolds into its own chest pocket

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

  • Zippered chest pocket with internal media portKeeps playlist playable
  • Zippered hand pocketsSecure essentials
  • Two internal stash pocketsEasy access storage
  • 100% recycled ripstop polyester (main body); 95% polyester/5% spandex (side panels)
  • Average length: Reg 26.5"; Tall 28.5"
  • Average garment weight: 8.32 oz
  • Imported
  • Machine wash

MicroTherm™ Down

MicroTherm is First Ascent's lightest, warmest down construction, which pairs high quality, high fill power down 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.


Our durable water-repellent (DWR) finish causes moisture to bead on the surface so it rolls off or evaporates rather than soaking into the fabric.

Regular Item #:
Regular -
Tall -
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