Patagonia Micro Puff Hoody


Basic summary: Breathability isn’t optimal for intense aerobic activity, but for long outings in the cold, the Micro Puff is an excellent option as an external layer for dry conditions or a midlayer in winter precipitation.

MSRP: $299


  • Weight: 264g (9.3oz)
  • Material construction
    • Shell and lining: 0.7-oz 10-denier 100% nylon ripstop Pertex Quantum
    • Insulation: 65-g PlumaFill 100% polyester
  • Durable water repellent (DWR) finish on shell and lining
  • Center-front zipper with wicking interior storm flap and zipper garage at chin
  • Two welted zippered handwarmer pockets
  • Left hand pocket doubles as a stuff sack with carabiner clip-in loop
  • Under-the-helmet hood construction
  • Elasticized cuffs and hem

Deep Dive:

Sometimes it’s hard to tell what’s going on with Patagonia’s product innovations. As a standard bearer in responsible sourcing and manufacturing techniques, many of the company’s process improvements either take place behind the scenes (for example, using Fair Trade Certified factories for fleece production), or aren’t obvious to the untrained eye (such as increasing its use of post-consumer content for insulating materials). That’s not the case with their new Micro Puff Hoody, which features innovations that are easy to see and feel.

Large offset quilting blocks

The first thing you’ll notice is the appearance of the shell, made from a superthin nylon ripstop called Pertex Quantum GL that is Patagonia’s lightest external shell fabric. It has a somewhat glossy finish and is excellent at blocking wind. The quilting is somewhat nontraditional in that it combines offset blocks of differing sizes that are generally larger than typical blocks of synthetic down jackets. The decreased number of quilting seams allows heat to move more freely throughout the jacket, creating consistent distribution of warmth rather than having temperature variation either from front to back or between the trunk and extremities.

This quilting design is only possible thanks to a key innovation on the inside: Patagonia’s new PlumaFill insulation, a featherlight synthetic material that replicates the structure and function of down, but is constructed in hyperthin filaments rather than loose fibers, so it doesn’t migrate or clump within the jacket like down does over time. Less migration means less fewer quilted baffles are needed to hold the insulation in place.

Jacket compressed into left-hand pocket

Because it’s a synthetic material, PrimaFill insulation maintains warmth even when wet, and has strong resiliency to restore its loft after being compressed. However, it is comparable to natural down in its warmth to weight effectiveness, and packs down much more tightly than any of Patagonia’s previous synthetic insulating materials. Like many midlayer jackets, the Micro Puff packs down into one of its own pockets – but unlike most similar products, it’s possible to squeeze the Micro Puff about 50% smaller after it’s packed away.

To maximize its compressibility and keep weight to a minimum, the Micro Puff Hoody is intentionally constructed with few additional features aside from two zippered hand pockets that are also drop-in pouches on the interior of the jacket. The cuffs and hood collar both have “passive adjustability” systems – a fancy way of saying they use soft elastic rather than Velcro, pullcords, or other fasteners. The hood is form-fitting and doesn’t tighten down, but it stays in place well and moves comfortably without compromising vision as you turn your head. It’s easy to wear a compact headlamp under the hood and still maintain insulation around your head and neck.

As you’d expect in a garment that emphasizes insulation as its primary performance attribute, the Micro Puff Hoody runs warm in conditions when you need to dump heat efficiently. It’s less suited for cold-weather tempo runs than it is for long steady winter efforts – and one ideal use we can see is using the Micro Puff during the night of a 100-miler in the mountains. We’ve worn another Patagonia product, their Nano Puff Hoody, for this purpose a few times, and the new Micro Puff Hoody provides just as much warmth and weather resistance in a garment that’s 27% lighter: 363g for the Nano Puff Hoody, 264g for the Micro Puff Hoody. (For one more point of comparison, Patagonia’s Nano Air Hoody weighs 397g.)

Patagonia’s Micro Puff is currently only available in the hoody style, but a non-hooded version is expected for early 2018. It is available in men’s and women’s versions at


About Author

Donald is a physical therapist, California native, barefoot aficionado, and father of three with more than 25 years of experience in endurance sports. He was a collegiate rower at UCLA, then dabbled in marathons and Ironman-distance triathlons before falling in love with ultras in the early 2000s. His favorite locations to run include Marin County, CA, and the Sierra Nevada mountains, and he loves exploring America's National Parks. When he's not training for ultramarathons, he enjoys hiking or slacklining with his family in Monterey County, CA.

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