Sea to Summit's Ascent Down Sleeping Bag has quickly become one of our go-to bags for all conditions. Weight: 2 pounds, 10 ounces | Temperature Rating: 0 degrees | Type of Fill: Goose down | Fill Rating: 850 But it's probably overkill for campers or backpackers not spending many nights a season in colder environments. Overall, the weight and warmth make this a great sleeping bag for those spending many nights backpacking in the high alpine or push their seasons into colder months. These features make the bag more comfortable by creating a de facto built-in pillow around your head even if that's not their main purpose.' 'There's also a cinch to seal the hood around your head for when temperatures are at the lower end of the bag's capabilities. 'The hood is an area where the Phantom really stands out compared to other bags we tested, with a solid draft collar to hold in warmth,' our tester reported. The taper also reduces the volume and weight of the bag. The reasons for utilizing a mummy shape are to minimize the space inside the bag that your body has to heat. The bag utilizes the typical backpacking 'mummy' shape that tapers down along the legs and can feel restrictive for first-time users. 'Mountain Hardwear's Phantom 0F is essentially a puffy down jacket in sleeping bag form,' one of our testers said. Pro-tip: Store the bag in the mesh sack it comes with, not to crush the down fill, which will cut down on warmth. We appreciate the two-way glow-in-the-dark zipper for easier nighttime exits.

A DWR finish helps repel outside moisture, which is handy for any potential snowy conditions. The Phantom's 10D recycled nylon ripstop holds up to normal backcountry wear and tear. Packing small and weighing in at less than 3 pounds makes this bag, which has an 850-fill goose-down insulation, ideal for backpacking and hut trips.

And the draft collar and face gasket help trap precious warm air inside the bag. That's why we love the Phantom's four chambers of loft in the hood. Mountain Hardwear's 0F Phantom is a solid do-everything winter bag-though it's a bit pricey.

Mountain Hardwear Phantom 0F Sleeping Bag Review

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