... for, and suit the temperature it's being used for • SIZEWho will be using it? An average sized person can fit ... comes in basically two types of materials, natural down, typically goose feathers, and synthetic or man made fibers. Pound ... left zip and a right zip bag, you can typically zip the two together. If you are a ... bag after a night of sleeping in it to air it out. If it's not raining or damp out, ...