How to Attach Two Sleeping Bags Together for Extra Space
Have you ever woken up cramped in your sleeping bag, wishing for just a little more room to stretch? You're not alone—over 30% of outdoor campers say lack of space is their biggest sleep complaint.
Yes, you can zip two sleeping bags together—but not all bags are compatible. It depends on the zipper type, placement, and size.
Many campers ask this question after a night of bumping elbows or trying to keep kids close on a cold night. The idea sounds simple: two bags, one big cozy sleep space. But the reality? It depends on a few small design details that make all the difference. Let me walk you through how it works and what to watch for.
Can You Zip Any Two Sleeping Bags Together?
Some sleeping bags are made to be zipped together. Others, not so much. And forcing them can damage your gear.
You can zip two sleeping bags together only if they have compatible zippers and matching left and right-hand configurations.
Why Compatibility Matters
Sleeping bags that zip together usually come in pairs—a left-zip and a right-zip. Most brands design their bags this way intentionally, especially rectangular bags. Mummy bags, on the other hand, are more difficult to join.
| Factor | Why It Matters | What to Check |
|---|---|---|
| Zipper Size | Mismatched sizes won't align | Look for YKK #5 or #8 zippers |
| Zipper Type | Coil zippers vs. tooth zippers | Must be the same type |
| Left/Right Orientation | One bag must be left-zip, one right-zip | Check product labels |
| Bag Shape | Rectangular bags join better | Mummy bags need special design |
Some brands like Coleman or KingCamp make it easy by clearly labeling compatible bags. Others may require a bit of guesswork. I've seen customers try to zip together two right-hand mummy bags and end up tearing seams. Not fun.
How Do You Zip Two Sleeping Bags Together?
Once you’ve confirmed they’re compatible, it’s easier than you think.
Lay the bags flat, align the zippers, and zip around the perimeter to join them into one large sleeping space.
Step-by-Step Instructions
If your bags match, follow these steps:
- Lay both bags flat, zippers facing outward.
- Unzip both bags completely so they lie open like blankets.
- Place one bag on top of the other, aligning the foot and side zippers.
- Start zipping from the bottom (foot area) around to the side and up.
- Secure the hood (if any) using the drawstrings or snaps.
This creates one large sleeping space. Perfect for couples, kids, or just spreading out. I've even used this trick for pets or storing extra gear close by on chilly nights.
What Types of Sleeping Bags Zip Together Best?
Shape and design play a big role. And some brands make this easier than others.
Rectangular sleeping bags with full-length zippers are the easiest to zip together. Mummy bags need to be specially designed for pairing.
Know Your Bag Type
| Bag Type | Zip-Together Friendly? | Notes |
|---|---|---|
| Rectangular | Yes | Best option for pairing |
| Semi-rectangular | Sometimes | Depends on brand and zipper |
| Mummy | Rarely | Only if designed for pairing |
| Double Bag | Already designed for two | No need to zip |
When I recommend sleeping bags to my B2B clients—especially for family-focused outdoor brands—I always suggest rectangular bags with YKK zippers. It reduces customer complaints and returns significantly.
Are There Downsides to Zipping Sleeping Bags Together?
It’s not all comfort and cuddles. There are trade-offs to consider.
Zipping two bags together can reduce insulation and create cold spots, especially around the zipper line.
What to Watch Out For
| Problem | Cause | Solution |
|---|---|---|
| Cold drafts | Gaps along the zipper | Use a draft tube or blanket |
| Movement restrictions | One person shifts, affects the other | Use roomy bags or attach loosely |
| Uneven insulation | One bag warmer than the other | Match temperature ratings |
| Zipper snags | Misaligned or low-quality zippers | Choose high-quality zippers |
When sourcing bags for clients with colder weather needs, I always advise looking for models with draft tubes or overlapping zipper covers. These small details make a big difference.
Conclusion
Zipping two sleeping bags together is easy if you have the right gear—and it can totally change your camping experience.
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