How to Choose Sleeping Bags for Backpacking

Ultralight and warm, this Mountain Hardwear sleeping bag is highly compressible. It's made with the same 100% recycled shell as the Ghost Whisperer™ series. It uses high-lofting, 800-fill-power down.
Imported.
| Best Use | Backpacking |
|---|---|
| Tested Lower Limit | 0 degrees (F) - ISO |
| Tested Comfort | 12 degrees (F) - ISO |
| Temperature Rating (F) | 0 degrees (F) |
| Temperature Rating (C) | -18 degrees (C) |
| Weight | Short - Left Zip: 2 lbs. 8.4 oz. Regular - Left Zip: 2 lbs. 10.4 oz. Long - Left Zip: 2 lbs. 13.3 oz. |
| Ultralight | Yes |
| Shell | 10-denier recycled nylon ghost ripstop 26 g/m²: 100% recycled nylon |
| Zipper Location | Left |
| Insulation Type | Down |
| Fill | 800-fill-power RDS®-certified down; certified by Control Union (license number: CU 848416) |
| Fill Weight | Short - Left Zip: 1 lb. 12.4 oz. Regular - Left Zip: 1 lb. 14.5 oz. Long - Left Zip: 2 lbs. 0.6 oz. |
| Sleeping Capacity | 1-person |
| Lining | 15-denier nylon ripstop: 100% nylon |
| Sleeping Bag Shape | Mummy |
| Fits Up To (in.) | Short - Left Zip: 68 inches Regular - Left Zip: 72 inches Long - Left Zip: 78 inches |
| Shoulder Girth (in.) | Short - Left Zip: 56 inches Regular - Left Zip: 58 inches Long - Left Zip: 60 inches |
| Hip Girth (in.) | Short - Left Zip: 49 inches Regular - Left Zip: 52 inches Long - Left Zip: 55 inches |
| Stuff Sack Size | 8.25 x 16.5 inches |
| Compressed Volume | Short - Left Zip: 8.9 liters Regular - Left Zip: 9.7 liters Long - Left Zip: 10.5 liters |
| Gender | Unisex |
| Sustainability | Down certified to the Responsible Down Standard (RDS) |
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I'm happy to report this Phantom is sized right. I'm fine with this type of mummy bag fitting close as this saves weight but it can't be so tight that the down gets compressed. I have the older Phantom Alpine bag (the yellow one) which is definitely ultra light but it was just too narrow across the chest and shoulders. This current Phantom is just right. All the other features and quality are excellent. The nylons are durable enough and feel soft against the skin. The neck baffle is nice and thick. More of the insulation is on the top than the bottom as it should be. Even at it's somewhat premium price, I'd buy this bag again.
[Employee of mountainhardwear] Alaska, Himalaya, Andes- you name it. This is your bag. The Phantom 0F is the right size, the right warmth, and the right materials for the job. I use this all over the world and consider it to be the best option on the market for this temperature rating. Comes with an awesome 3 strap compression sack and packs very small. You can easily sleep in this bag with other things inside as well (ex: gloves, water bottles, boot liners). Great product.
After researching the top lightweight zero degree down bag options on the market, this one is at the top of the list and it doesn’t disappoint. The Phantom is worth it. It’s smaller when compressed than any zero degree bag I’ve ever had, warmer, and lighter. I’m truly impressed with this product and think it’s absolutely worth the investment to have the right gear for the adventure.
Before buying this, my sleeping bad added so much extra weight and took up so much space, after using it on two trips it is a huge noticeable difference! I have way more extra room and by pack is way less heavy. Most important though, it keeps me very warm at night, I do wish it had an inside pocket but I will live. Thank you MTN HARDWEAR!
Used for the first time in Death Valley. Slept under the stars. Kept me very comfortable. Very pleased with the weight of it. I use it for motorcycle camping where light weight counts. It’s a larger package than my summer bay but that didn’t keep me warm like this one.
Light weight and warm. Used when climbing to 20,000 in Ecuador. Excellent bag.




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