Montbell designed its Ultralight Down T with weight-savvy, ultralight purists in mind.

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Rely on The North Face Men's Aconcagua Down Jacket for durable versatility that keeps you warm with 550-fill down; on or off the mountain.

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There's no need to commit some horrible crime or lead a degenerate life in order to enjoy the toasty warmth of Hades. Simply zip on the Columbia Men's Hellfire Down Jacket, and you can stay warm all winter while still leading a virtuous life.

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At just seven-ounces light, the Stoic Men's Hadron Down Cardigan packs a powerful warmth-to-weight ratio that makes your other synthetic-insulated jacket look childish in comparison.

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If anything, you may sweat from warmth in the Marmot Zeus 1/2 Zip Jacket.

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The Mountain Hardwear Men's Lodown Down Jacket has the skinny on compressible warmth.

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Designed to outshine that old, bulky fleece layer that you've been lugging around in your pack, the MontBell Men's Ultralight Down Jacket weights no more than a T-shirt and packs up around the size of a water bottle.

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Whether it's your turn to belay or you're simply waiting for the rest of the crew to reach the summit, pull out the Columbia Men's Reach The Peak Down Jacket if you start to get the shivers.

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If you've never worn an ultralight down jacket under a shell on a frigid day, don't delay one season longer and pick up the Outdoor Research Meni 1/2s Transcendent Down Jacket now.

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For fast-and-light climbing missions, extended backpacking trips, or backcountry ski tours, the Marmot MenAAAs Zeus Down Jacket gives you the warmth of a down jacket for less weight than a traditional fleece.

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