Should sleeping bags be made of down or synthetic? What sleeping bag is best for camping, hiking or backpacking? A guide to make your decision easier.
First off it should at least be rated for lowest possible temperature you'll encounter. You may want to even go a little lower just to be on safe side.
Obviously main purpose is to hold your body heat in to insulate you from cooler air. So better insulation holds your body heat in warmer and more comfortable you're going to be.
Down-the filamentous and fluffy layer underneath feathers. Positives: All being equal down is warmer, lighter, more comfortable, compresses smaller, and can last a lifetime if cared for properly. Goose down is standard others are compared to. The more it lofts better it insulates. This is known as fill-power, higher number better it retains heat.
Negatives: Down looses most all of it's insulating properties when wet, takes a long time to dry outdoors, is more expensive short-term, and may require professional cleaning.
Synthetic- These are usually hollow plastic threads that serve to trap warm air. Positives: Synthetic sleeping bags retain heat better when wet, costs less short-term when compared to same temperature rating as down, dries quicker than down, and is hypo-allergenic. It's usually well-suited for recreational use, but consider your own individual needs.
Negatives: They're bulkier, heavier, less conforming, and can lose their insulating properties after a few seasons of hard use because of breakdown. More expensive long-term.
Child's/Kid sleeping bags- A kid has a harder time staying warm than an adult, so keep this in mind when you're getting them a sleeping bag. A cool summer night can chill a child quickly so consider a mummy bag like Tigger by North Face to keep them warm and cozy.