GEAR
DOWN STILL DOES THE TRICK
Despite all the technological marvels of our age, nothing beats a goose down sleeping bag. The soft plumage remains one of the world's best insulators, plus it's lightweight and you can stuff a down bag smaller than one filled with synthetic material. You do pay a premium, however, and down doesn't like to get wet, so make sure the outer material is coated with DWR (durable water repellent).
There are also ethical considerations, since down is an animal product. If you want to be sure the down in your