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Sure it's chilly out, but why train indoors when you can zip up the Mountain Hardwear Women's Effusion Power Jacket and head out for a trail run? Its Micro Climate Zoning construction features both windproof, water-resistant panels and stretchy, breathable panels to provide protection and mobility where you need them most.

  • AirShield Active membrane provides water-resistant, windproof, and breathable protection while you run, train, or cross country ski
  • The outer fabric uses a DWR finish to combat light drizzle while the inner lining uses a wicking finish to keep you dry on uphill climbs
  • Micro Climate Zoning construction uses a combination of ventilation, insulation, and stretch where your body needs each the most
  • Strategically placed knit panels offer increased breathability and mobility
  • Water-resistant zippered chest pocket stashes your media player or energy goo
  • Thumbloops keep your sleeves down and add a bit of extra wrist and hand coverage while you run

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Here's what others have to say...


Light weight jacket

  • Gender:Female
  • Familiarity:I've used it several times
  • Fit:True to size

This jacket is lighter weight than I expected. I can wear it under my North Face Rain jacket with out it feeling bulky. I bought an XL just a little big in some areas but it does have a weird bunching in the chest area. It almost rises up on you when wearing it. I was surprised how much the regular price was for this jacket because of how light weight it is. Not even sure I would consider this a jacket. You defiantly have to layer it if you want to stay warm. Wearing it alone is good only over 55+ degrees weather outside.



  • Gender:Female
  • Familiarity:I've used it several times

I originally bought the jacket in XS but it was too tight in the arms and chest (I am 5'2" and 108 lbs); I exchanged it for a S, and it fits perfectly. It is a pretty fitted jacket. I use it for hiking and find it provides good wind and rain protection in mild/moderate conditions. It is very lightweight. I love the look and the purple color.


really wanted to like it

  • Gender:Female
  • Familiarity:I returned this product before using it

but it had some strange bunching in the chest area. I am always ont he lookout for running jackets with a chest pocket (that way my phone doesnt' freeze on the cold days) I sized up (Im 5'3 120, but I have bigger shoulders) and I think it is made for someone with much bigger boobs than I have. It looked really strange.