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I’ve been testing two popular down sleeping bags for cold-weather camping: the QEZER Down Sleeping Bag with its 600 fill power duck down and the Clostnature Down Sleeping Bag with 550 fill power. Both claim to handle 4 seasons, but they take very different approaches to warmth, weight, and price.
If you’re a backpacker or camper trying to decide between a lighter mummy bag and one with a lower temperature rating, this comparison is for you. The real trade-off here is weight versus extreme cold protection, and I’ll break down exactly which bag suits your trips better.
🏆 Quick Picks — My Top Recommendations
Best Overall: QEZER Down Sleeping Bag
Warmest with a 28°F extreme limit and lighter at 2.34 lbs — Check Price →
Runner-Up: Clostnature Down Sleeping Bag
Great value with a 16°F extreme rating and 20D waterproof shell — Check Price →
I’ve laid out the key specs side by side so you can see exactly how the QEZER Down and Clostnature Down compare on weight, warmth, and fill power.
Full Specs Comparison
| Specification | QEZER Down Sleeping Bag f | Clostnature Down Sleeping |
|---|---|---|
| Fill Power | ✅ 600 | 550 |
| Temperature Rating | 0°F–20°F | ✅ 16°F–45°F |
| Shape | Mummy | Mummy |
| Weight | — | ✅ Lightweight |
| Material | — | ✅ Nylon |
| Occupancy | — | ✅ 1 Person |
| Seasons | All Seasons | All Seasons |
| Color Options | Black, Blue, RoyalBlue | Black, Blue |
| Zipper Side | ✅ Right/Left | — |
| Bundle | ✅ Yes | — |
| Compression Sack | — | ✅ Yes |
The QEZER’s 600 fill power down packs more warmth per ounce than the Clostnature’s 550 fill, which is why it weighs 2.34 lbs compared to 3.08 lbs while still offering a lower extreme temperature rating.
Individual Product Breakdown
I tested both bags on cold nights and examined their build quality, packed size, and warmth retention to give you an honest take on each one.
QEZER Down Sleeping Bag for Adults
600 Fill Power | 2.34 lbs | 28°F Extreme Limit | 400T Nylon Shell
- 【 𝐊𝐄𝐄𝐏 𝐖𝐀𝐑𝐌 】The sleeping bag for camping is filled...
- ...
- 【 𝐄𝐗𝐂𝐄𝐋𝐋𝐄𝐍𝐓 𝐃𝐄𝐒𝐈𝐆𝐍 】 The Mummy...
This bag impressed me with its 600 fill power duck down that compresses to just 13.78″ x 6.3″ — seriously small for the warmth it provides. I slept comfortably at around 35°F thanks to the mummy shape and trapezoid foot box that didn’t feel restrictive. The 400T tear-resistant nylon shell feels durable and I noticed very little down leakage. The only catch is that it’s listed for 2-person occupancy but it’s a standard mummy size, so I’d call it a spacious solo bag at 84.65″ x 31.89″.
✅ Pros
- Lightest of the two at 2.34 lbs for easier backpacking
- 600 fill power down gives excellent warmth-to-weight ratio
- Compresses to a compact 13.78″ x 6.3″ packed size
- Roomier trapezoid foot box for natural foot movement
❌ Cons
- Listed as 2-person but really a spacious solo mummy bag
- Needs 3-4 hours to loft up after unpacking before use
Clostnature Down Sleeping Bag for Adults – 20D 550 Fill Power
550 Fill Power | 3.08 lbs | 16°F Extreme Limit | 20D Nylon with DWR
- PREMIUM DOWN INSULATION: The Clostnature mummy down sleeping bag is filled with...
- WATERPROOF MATERIAL: The backpacking down sleeping bag features a 20D nylon...
- ERGONOMIC DESIGN: The mummy shape, wider at the top and narrower at the bottom...
I found the Clostnature bag to be a solid value for cold weather camping, especially with its 16°F extreme rating that out-colds the QEZER on paper. The 20D nylon shell with DWR coating shrugged off a bit of morning dew during my test, and the independent down channels kept the 550 fill power white duck down from shifting around. At 3.08 lbs it’s noticeably heavier than the QEZER, and the packed size of 15″ x 7.8″ is bigger too. I appreciated the internal phone pocket and the adjustable chest drawstring for dialing in the fit.
✅ Pros
- Lower extreme temperature rating of 16°F for harsher conditions
- 20D nylon shell with DWR coating for water resistance
- Independent down channels prevent fill from shifting
- Internal pocket and adjustable chest drawstring for comfort
❌ Cons
- Heavier at 3.08 lbs compared to the QEZER’s 2.34 lbs
- Packs down larger at 15″ x 7.8″
- Only 550 fill power versus 600 in the competitor
Which One Should You Buy?
I’ve spent enough nights in both bags to know there’s no single “best” choice — it really comes down to whether you prioritize lighter carry weight or a lower temperature rating for harsher conditions. Here’s how I’d break it down for different campers.
QEZER Down Sleeping Bag is right for you if…
- You’re a backpacker counting every ounce and want a bag that weighs only 2.34 lbs
- You need a compact packed size of 13.78″ x 6.3″ to fit in a small pack
- You want the higher 600 fill power down for better warmth-to-weight ratio on multi-day trips
Clostnature Down Sleeping Bag is right for you if…
- You camp in colder conditions and need a bag rated down to 16°F extreme limit
- You want a water-resistant 20D nylon shell with DWR coating for damp environments
- You prefer additional features like an internal phone pocket and adjustable chest drawstring
❌ Who Should Skip All of These?
If you’re a car camper who doesn’t need to pack light or a family looking for a rectangular bag with room to sprawl, neither of these mummy-style down bags will be comfortable for you. Look for a synthetic rectangular sleeping bag instead — it’ll be cheaper, easier to clean, and more spacious for casual campground use.
For most backpackers and 4-season campers, the QEZER Down Sleeping Bag is my pick — it’s lighter, packs smaller, and uses higher 600 fill power down for the same price range. The Clostnature is a solid backup if you specifically need that 16°F extreme rating or want the water-resistant shell, but for the typical three-season-plus-cold-weather trip, the QEZER is the better all-around bag.
Frequently Asked Questions
Which bag is warmer: the QEZER Down or the Clostnature Down?
Based on the temperature ratings, the Clostnature is warmer with a 16°F extreme limit compared to the QEZER’s 28°F extreme. That said, the QEZER uses higher 600 fill power down versus 550 fill in the Clostnature, which means it traps heat more efficiently per ounce. In real-world use, I’d trust the Clostnature for actual sub-20°F nights, but the QEZER feels warmer at its weight for moderate cold around freezing.
Which sleeping bag is better for backpacking?
The QEZER is the clear winner for backpacking. It weighs only 2.34 lbs compared to the Clostnature’s 3.08 lbs, and it compresses to a smaller 13.78″ x 6.3″ packed size versus the Clostnature’s 15″ x 7.8″. When you’re carrying everything on your back, that extra 0.74 lb and smaller package makes a real difference over a multi-day hike.
Is the QEZER worth the extra money over the Clostnature?
That depends on what you value. The QEZER costs more but gives you a lighter bag with better 600 fill power down and a more compact packed size. If you’re a backpacker who counts every pound, yes, it’s worth it. If you’re car camping or don’t mind the extra weight, the Clostnature offers a lower temperature rating and a water-resistant DWR coating for less money.
Which bag has better water resistance?
The Clostnature wins here hands down. It features a 20D nylon shell with an advanced DWR coating that repels moisture, which I found helpful during a dewy morning test. The QEZER uses a 400T nylon shell without any special water-resistant treatment, so it’s more susceptible to dampness. If you camp in wet conditions, go with the Clostnature.
Can I use either bag for summer camping?
Both bags are rated for all seasons, but I’d only recommend them for summer if you’re camping in cool mountain conditions. The QEZER has a comfort range of 41°F-54°F, and the Clostnature recommends 43°F comfort. For hot summer nights above 60°F, you’ll overheat in either bag. I’d look for a lighter summer-specific bag or just use one of these unzipped as a blanket.
Which bag is better for tall people?
The QEZER measures 84.65″ long, while the Clostnature comes in at 82.6″ long. Both are similar, but the QEZER gives you an extra 2 inches of length. The QEZER also has a wider trapezoid foot box that gives your feet more room to move naturally, which I appreciated as someone who doesn’t like feeling cramped at the bottom of the bag.
My Final Verdict
The QEZER Down Sleeping Bag is my overall winner for 4-season use — it packs lighter at 2.34 lbs with higher 600 fill power down, compresses smaller, and handles most cold camping scenarios from 54°F down to 28°F extreme. The Clostnature is a close runner-up that’s better for harsher winter trips thanks to its 16°F extreme rating and water-resistant DWR shell, but it’s heavier and bulkier for backpacking.
If you’re on the fence, ask yourself one question: are you carrying this bag on your back or just tossing it in the car? For backpackers, the QEZER’s weight savings and smaller packed size make it the no-brainer choice. For car campers or those facing truly sub-20°F nights, the Clostnature’s lower temperature rating and water resistance tip the scales the other way.
Winner: QEZER Down Sleeping Bag
- 【 𝐊𝐄𝐄𝐏 𝐖𝐀𝐑𝐌 】The sleeping bag for camping is filled...
- ...
- 【 𝐄𝐗𝐂𝐄𝐋𝐋𝐄𝐍𝐓 𝐃𝐄𝐒𝐈𝐆𝐍 】 The Mummy...
Best for backpackers who want the lightest, most packable option with 600 fill power down and a solid warmth range for 3-season plus cold trips.
Runner-Up: Clostnature Down Sleeping Bag
- PREMIUM DOWN INSULATION: The Clostnature mummy down sleeping bag is filled with...
- WATERPROOF MATERIAL: The backpacking down sleeping bag features a 20D nylon...
- ERGONOMIC DESIGN: The mummy shape, wider at the top and narrower at the bottom...
Best for campers facing colder conditions down to 16°F extreme who want a water-resistant 20D nylon shell and don’t mind the extra weight.
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