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Sierra Designs built the Men's Flex Down Jacket for folks who are just sick and tired of being cold. Period. Backpacker Magazine named the Flex 'Warmest Puffy Jacket' for a reason. Sierra Designs' Flex baffle construction keeps the jacket snug but allows for layering as well, and the 650 fill-power down insulation locks in heat so you can ski, ride, or just chill in sub-nothing temperatures comfortably.

  • Nylon ripstop shell keeps feathers from poking out
  • High quality 650 fill-power goose down is light, packable, and extremely warm
  • Soft polyester taffeta lining feels good against your skin
  • Center front storm flap locks out drafts
  • fully adjustable hood and elasticized hem seal out drafts
  • Interior zip pocket for security
  • Two interior dump pockets for the essentials

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Sierra Designs Flex Down Jacket - Men's

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What is the fill weight?

What is the fill weight?

5 5

Love it!

  • Gender: Male

I have to agree with the description of this jacket, it is WARM! With just a t-shirt underneath I'm comfortable down into single digits. I mostly wear this for walking around town or going out on the coldest of days. It's still comfortable up into the 30-40 degree range though. I haven't used it much for physical activity for fear of being too hot. Love the fit and feel as well, I'm 6'1", 175 lbs and a Large fits great. I could see this working well at a resort by itself or under a shell if need be.