DESC: The Marmot Hydrogen is the lightest full-size sleeping bag on the market. It is far more comfortable than the extremist bags that fit like skin on an apple. But this 30-degree bag still manages to weigh in at a ridiculous 1.5 pounds. What's more, it compresses down to the size of a balled up vest. A long lasting water-repellent finish protects the superior loft and warmth of the 900-fill down. And the shell itself is constructed with the same ripstop fabric that you'll find in a parasail, so you know it's tough as nails. This bag is suitable for backpacking and bike touring when every ounce counts. Marmot, Hydrogen, Sleeping, Bag, -, 30, Degree, Down, camp, hike, 900, fill, goose, down, summer, warm, weather, mummy, bag, sleep, camp, camping, down, feather, desert