If you're the dude who cuts his toothbrush in half, shaves his legs, and pulls out all his teeth to save weight before going backpacking, odds are you'll fall in love with the Marmot Plasma 40-Degree Down Sleeping Bag. It's pretty much a one-season bag (mild spring and fall nights will be OK, too), but good gravy, is it light and packable—does 1lb 2oz float your boat?

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