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Why ultralight sleeping bags? Because ultralight hiking is made possible by cutting the weight of the "big three;" the backpack, housing and sleeping bag. The times of five-pound summer bags are gone - at the very least for anyone people who choose to get light. 

One Lb Ultralight Sleeping Bags 

There are several one-pound ultralight sleeping bags available on the market now. My very own is 17 ounces. It really weighs 19 ounces with the stuff bag, but stuff carriers aren't always necessary. It may be packed into my pack or devote a half-ounce bread bag. It's a sleeping bag, and has kept me warm down to below freezing - warmer, in fact, than my four-pound bag used to keep me. 

It looks sensitive, and it has been babied by me through the years, but it could be tougher than I thought. It has been used by me from sea-level to 16,000 feet, in every types of temperature, generally camping under a, yet it still has its attic, and it looks almost new. The zipper goes only half-way down, to truly save weight, and it's a mummy case, but I am 6'3", 165 pounds, and I've always been comfortable in it.  [http://www.youtube.com/watch?v=ckN8us7nLZQ boeing 747 airforce one 3d model]

Sleeping bags weighing around a are summer bags, scored down seriously to 40 to 50 degrees fahrenheit. A fast check of the newest bags out there, though, implies that even one or two of the 0 level bags are under three pounds now. These are down filled bags, needless to say, as down continues to be the lightest insulation for the weight. 

Still another major benefit of any down sleeping bag can it be is compressibility. Nothing packs smaller than down. But, an excellent artificial case is most likely much better than down if you're often setting it up wet. 

A few sythetic-fill sleeping bags now come near to down in their warmth-to-weight ratio. A minumum of one an even 16 ounces are weighed by summer bag, using Polarguard fill,. That is extremely light for a case. 

Using Ultralight Resting Bags 

Ultralight sleeping bags generally are not tough. They are treated by the lighter the bag, the more fragile, but lightly, and they work good. I've used mine for many years, in snow and rain, from Ecuador to California to Michigan, and it shows little use. Baby these exact things, and they are able to last a long time.