For decades, the "Mummy Sleeping Bag" was the undisputed king of camping gear. If you went camping, you bought a bag.
But recently, a revolution has taken over the long-distance hiking community. Walk the Pacific Crest Trail today, and you will see fewer sleeping bags and more Backpacking Quilts.
Why are hikers cutting the backs off their sleeping bags? Is it just to save weight, or is it actually more comfortable?
The Big Question: Should you stick with the traditional mummy bag, or join the ultralight quilt movement? Let's find out.
1. The Mummy Sleeping Bag 🧛
You know this one. It wraps around your entire body, including your head, leaving only your nose exposed.
The Good:
- Draft Protection: It is a sealed cocoon. No cold air can get in.
- Easy to Use: Just unroll it and jump in. No setup required.
- Hood Included: Keeps your head warm without needing a separate beanie.
The Bad:
- Restrictive: If you toss and turn at night, or sleep on your side, mummy bags can feel like a straitjacket.
- Wasted Weight: This is the big one. The insulation underneath your body gets crushed by your weight. Crushed insulation traps no air, meaning it provides zero warmth. You are carrying extra weight for nothing.
2. The Camping Quilt ⛺
A quilt looks like a sleeping bag with the back (and the hood) removed. It attaches directly to your sleeping pad using straps.
The Good:
- Lighter & Smaller: By removing the back fabric, the zipper, and the hood, quilts are 20-30% lighter than bags.
- Freedom of Movement: You can move your legs, sleep on your stomach, or sprawl out just like you do in your bed at home.
- Versatile: Too hot? Open it up like a blanket. Too cold? Strap it down tight.
The Bad:
- Drafts: If you move too much, cold air can sneak in from the sides (though straps help prevent this).
- Requires a Great Pad: Since your back is directly against the pad, your pad MUST have a high R-Value.
Warning: Never use a quilt with a cheap air mattress. Without a back on your bag, the pad is your only defense against the frozen ground. Check our guide on Pad R-Values before buying a quilt.
3. Which One Wins?
The choice comes down to how you sleep:
- Buy a Mummy Bag If: You are a "cold sleeper," you move very little at night, or you camp in extreme winter conditions where drafts are dangerous. Also, check if you prefer Down or Synthetic insulation first.
- Buy a Quilt If: You are a side sleeper, you feel claustrophobic in bags, or you want to drop weight from your pack without losing warmth.
Confused about the temperature numbers on the box? Don't buy anything until you read our next guide: The Truth About Temperature Ratings (Coming Soon).