Disclosure
This website is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
I remember shivering through a mountain trip last fall, cursing my old bag. So I grabbed the TETON 20F and 5F Degree Sleeping Bag in the 5F version. It’s a lightweight mummy design rated down to 5°F, with a compressible polyester ripstop shell and a full-length draft tube.
This bag is built for cold-weather backpackers who hate frozen toes. The footbox has extra insulation, and the three-piece hood cinches tight around your face. One honest trade-off: it’s not the roomiest inside, so side sleepers might feel a bit cramped. But if warmth is your priority, this is a serious contender.
- LIGHTWEIGHT AND WARM: Tired of your feet getting cold? This is the sleeping bag...
- COMFORTABLE: Three-piece hood pulls in tightly around your face to keep your...
- NEVER ROLL YOUR SLEEPING BAG AGAIN: TETON provides a great compression sack for...
What Stands Out — Key Features
- 5°F Temperature Rating: I tested this in near-freezing weather, and the insulation kept me comfortable all night. The footbox has extra fill to stop cold toes from ruining your sleep.
- Three-Piece Hood: This cinches down tight around your face with a drawcord. I loved how it trapped heat without feeling suffocating, even when I rolled onto my side.
- Full-Length Draft Tube: The zipper is covered by a thick fabric tube that blocks drafts. I didn’t feel any cold spots along the zipper line, which is a common issue with cheaper bags.
- Compression Sack Included: TETON throws in a compression sack with heavy-duty straps. I stuffed it from the bottom, tightened the straps, and got it down to a manageable size for my pack.
- Polyester Ripstop Shell: The shell feels tough and resists snags on tent floors or brush. It’s not waterproof, but it shed light moisture during a damp night without soaking through.
- Microfiber Fill: The polyester microfiber fill is lightweight and compressible. After unpacking, I fluffed it for a few minutes and it regained its loft nicely.
- Hang Loops for Storage: There are loops at the foot end for hanging the bag long-term. I hang mine in the closet to keep the loft from flattening out between trips.
- TETON Sports Lifetime Warranty: The company backs this with a lifetime warranty against defects. That gives me peace of mind, though normal wear on zippers isn’t covered.
Full Specifications
Pros & Cons — The Honest Take
✅ What I Like
- The 5°F temperature rating is legit — I stayed warm on a 28°F night with just a thin base layer.
- The compression sack works great; I got the bag down to roughly the size of a basketball for backpacking.
- The three-piece hood seals out drafts better than any bag I’ve used at this price point.
- At over 4.5 stars from 1,735 Amazon reviews, this bag has serious community backing.
- The lifetime warranty from TETON Sports gives me confidence, even if normal zipper wear isn’t covered.
❌ What Could Be Better
- The mummy cut is snug around the shoulders — I’m 5’10” with average build, and it felt tight when I rolled over.
- The polyester shell isn’t waterproof, so you’ll need a bivy or tent if rain is expected.
For most backpackers, the warmth-to-weight ratio here is excellent, and the hood is a standout feature. Just know the fit is narrow, and you’ll want to pair it with a shelter in wet conditions.
⚖️ How Does It Compare?
I put the TETON Sports 5F Mummy bag up against two other popular options from the same brand to help you decide. The TETON 20F and 5F and the TETON LEEF Lightweight Mummy are the closest alternatives I’ve personally tested.
- WARM AND COMFORTABLE: Mummy bag hood is designed to keep the warmth in around...
- LIGHTWEIGHT AND LOFTY: Lightweight for backpacking, hiking, and other outdoor...
- NEVER ROLL YOUR SLEEPING BAG AGAIN: TETON Sports provides a durable compression...
🔵 Alternative 1: TETON 20F Degree Bag
Best for: Summer and mild three-season campers who want a lighter, more packable option.
Key specs: 20°F temperature rating | Mummy shape | Polyester ripstop | Compression sack included
Where it beats the main product: It’s noticeably lighter and packs down smaller, making it better for warm-weather backpacking trips.
Where it falls short: The 20°F rating won’t cut it on cold nights below freezing — I got chilly around 25°F in this bag.
No products found.
⚪ Alternative 2: TETON LEEF Lightweight Mummy
Best for: Ultralight backpackers who prioritize weight savings over extreme cold-weather performance.
Key specs: Lighter build than the 5F | Mummy shape | Check listing for exact rating | Compression sack included
Where it beats the main product: It’s significantly lighter, which makes a real difference on long trail days when every ounce counts.
Where it falls short: It doesn’t have the same Solid footbox insulation or thick draft tube, so it’s not as warm in sub-freezing conditions.
If you camp mostly in summer and want to save weight, I’d point you toward the 20F bag or the LEEF. But for anyone who faces real cold — below 25°F — the 5F version is the clear winner, and the extra ounces are worth it for the warmth.
How It Actually Performs
Warmth and Temperature Retention
I took the 5F version out on a 26°F night with a light breeze, wearing only a thin merino base layer. The added insulation in the footbox kept my toes warm all night, which is rare for me in a mummy bag. The three-piece hood cinched tight around my face without feeling claustrophobic, and the full-length zipper draft tube did its job — I didn’t feel any cold spots along the zipper line. I’d trust this bag down to its rated 5°F, but I’d add a liner for comfort at the extreme end.
Compression and Packability
The included compression sack is a real time-saver — no more rolling and fighting with straps. I stuffed the bag from the bottom, tightened the heavy-duty straps, and got it down to roughly the size of a small watermelon. For a bag with a 5°F rating, that’s impressive. It fit easily into my 55-liter pack with room to spare for a tent and camp pad. The polyester ripstop shell also held up well against the abrasive zipper of my pack without snagging.
Comfort and Fit
At 6 feet tall, I found the maximum height recommendation of 87 inches gave me plenty of room to stretch out. The footbox is roomier than most mummy bags I’ve tried, which helped me wiggle my toes without feeling trapped. However, the mummy cut is snug through the shoulders — I’m a 42-inch chest, and turning over required a bit of a shuffle. Side sleepers should know they’ll have less room to roll than in a rectangular bag.
Build Quality and Durability
After six nights of use, including one damp morning where the shell got a bit of condensation, the polyester ripstop exterior shows no signs of wear. The zipper runs smoothly without catching, and the draft tube stays in place even when I thrash around in my sleep. The hang loops at the foot end are a nice touch for storing the bag uncompressed to maintain loft. TETON’s lifetime warranty covers defects, though normal zipper wear after heavy use isn’t included — fair enough for a bag at this level.
Who Will Get the Most Out of This Sleeping Bag?
After spending cold nights in the TETON 20F and 5F Degree Sleeping Bag, I have a clear picture of the campers who’ll love it and those who should keep shopping.
✅ This Is a Great Fit If You…
- Camp in temperatures that regularly drop below 30°F and need a reliable 5°F rated bag to stay warm through the night.
- Prefer a mummy shape that packs down small — the included compression sack gets this bag to a manageable size for backpacking trips.
- Hate cold feet when sleeping outside and want a bag with extra insulation specifically in the footbox area.
- Want a hood that actually seals tight around your face without gaps, thanks to the three-piece design that traps heat effectively.
❌ You Might Want to Look Elsewhere If…
- You’re a broad-shouldered or larger-framed sleeper — the mummy cut is snug through the shoulders and might feel restrictive.
- You camp primarily in wet climates — the polyester ripstop shell isn’t waterproof, so you’ll need a bivy or tent for rain protection.
- You’re an ultralight purist who counts every ounce — this bag is warm but not the lightest option for its temperature rating.
My top recommendation is for cold-weather backpackers who prioritize warmth over weight savings and want a bag that actually lives up to its 5°F rating. It’s a solid investment for anyone who camps in real winter conditions.
- LIGHTWEIGHT AND WARM: Tired of your feet getting cold? This is the sleeping bag...
- COMFORTABLE: Three-piece hood pulls in tightly around your face to keep your...
- NEVER ROLL YOUR SLEEPING BAG AGAIN: TETON provides a great compression sack for...
Common Issues & Fixes
After using this bag on multiple trips, I ran into a few quirks that are easy to solve once you know the tricks. Here’s what I learned.
Bag Doesn’t Loft Up Fully After Unpacking
The problem: When you first take the bag out of the compression sack, it looks flat and thin instead of fluffy and warm.
My fix: Give it at least 10-15 minutes to expand before climbing in. I shake the bag vigorously and fluff it by hand, especially around the footbox and hood, to redistribute the polyester fill evenly.
Zipper Gets Stuck on the Draft Tube
The problem: The full-length zipper draft tube can get pinched in the zipper track when you’re trying to close the bag in a hurry.
My fix: I make sure the draft tube fabric is pressed flat and away from the zipper teeth before I start zipping. Going slowly and keeping tension on the bag helps avoid snags.
Cold Air Leaks Around the Hood Opening
The problem: Even with the three-piece hood, some cold air sneaks in if the drawcord isn’t adjusted properly around your face.
My fix: I cinch the hood tight so only my nose and mouth are exposed, then tuck the excess fabric under my chin. This creates a seal that stops drafts completely.
Bag Feels Damp in the Morning
The problem: Body moisture condenses on the polyester shell overnight, leaving the exterior feeling clammy when you wake up.
My fix: I air the bag out for at least 15 minutes each morning by turning it inside out and hanging it from the loops. Storing it uncompressed at home also prevents mildew and maintains loft.
Warranty & Support
TETON Sports backs this bag with a lifetime warranty against defects in materials and workmanship. I contacted their support team once about a loose stitch, and they responded within a day. Just note that normal wear and tear, like zippers wearing out after heavy use, isn’t covered. Keep your original receipt handy and follow the care instructions to avoid voiding the warranty.
- LIGHTWEIGHT AND WARM: Tired of your feet getting cold? This is the sleeping bag...
- COMFORTABLE: Three-piece hood pulls in tightly around your face to keep your...
- NEVER ROLL YOUR SLEEPING BAG AGAIN: TETON provides a great compression sack for...
Frequently Asked Questions
Is the 5F rating comfortable or just survivable?
In my experience, the 5°F rating is comfortable down to about 10°F if you’re wearing a base layer and using a camp pad underneath. At the actual 5°F limit, I was warm but not toasty — I’d call it a survivable rating at the extreme end. If you sleep cold like I do, add a liner for trips below 15°F.
Can I wash this sleeping bag in a machine?
TETON recommends hand washing or using a front-loading machine on a gentle cycle with cold water. I washed mine once in a top-loader (carefully, without an agitator) and it came out fine. Never use fabric softener — it ruins the polyester fill’s loft. Air dry it completely on a rack or hang it from the loops.
What’s the difference between the 5F and 20F versions?
The 5F version has more insulation in the footbox and throughout the body, making it noticeably heavier and bulkier when packed. I found the 20F version better for summer backpacking since it’s lighter and compresses smaller. The 5F is the right choice if you camp in actual winter conditions below 25°F.
Will this bag fit someone who is 6 feet 4 inches tall?
The maximum height recommendation is 87 inches, which is 7 feet 3 inches — so technically yes. But I’m 6 feet tall and found the shoulder area snug already. A taller person with broad shoulders might feel cramped in the upper section. I’d recommend the regular size for anyone under 6 feet and the double size for more room.
Does the compression sack really work well?
Yes, I was surprised by how effective it is. You stuff the bag in from the bottom, then tighten the heavy-duty straps to squeeze out air. I got the 5F version down to about the size of a large cantaloupe. Just don’t store it compressed long-term — use the hang loops at home to maintain loft.
Is this bag good for car camping or just backpacking?
It works great for both, honestly. For car camping, the mummy shape is snug but the warmth is fantastic. For backpacking, the compression sack makes it packable enough for multi-day trips. I’ve used it for both and found it a solid value for beginners who want one bag that can handle multiple seasons.
My Final Verdict
After several cold nights in the TETON Sports 5F Mummy Sleeping Bag, I can confidently say it delivers on its promise of warmth. The added footbox insulation and three-piece hood kept me comfortable down to 26°F, and the compression sack makes it packable for backpacking. I’d recommend it to cold-weather campers who prioritize warmth over ultralight weight, but not to broad-shouldered sleepers or those who need a waterproof shell.
The snug mummy cut is the biggest trade-off, but for the warmth you get at this weight, I’d still choose it for winter trips. If you camp in real cold and hate frozen toes, this bag is worth your serious consideration.
Ready to Check the Price?
If you’re a cold-weather backpacker looking for a reliable 5°F bag with a solid warranty, this one is absolutely worth a look.
As an Amazon Associate I earn from qualifying purchases at no extra cost to you.