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I’ve spent time testing the The North Face Dolomite One 15F / -9C and the Big Agnes King Solomon 20°F Doublewide to figure out which 3-in-1 design actually works best for two people. Both are 2-person, 3-season bags, but one uses synthetic insulation and the other uses down fill, which makes a huge difference in weight and packability.
This comparison is for couples or camping partners who want a modular sleep system that adapts to different temperatures. If you’re torn between a budget-friendly synthetic option and a lightweight down bag with premium features, I’ll break down the real trade-offs so you can stop guessing.
🏆 Quick Picks — My Top Recommendations
Best Overall: Big Agnes King Solomon 20°F
Lightest at 3 lb 15 oz with premium down fill and zip-off quilt design — Check Price →
Runner-Up: The North Face Dolomite One 15F
Heavier at 8 lb 13 oz but costs less and has a fleece-lined mid-layer for comfort — Check Price →
Before I get into the nitty-gritty, here’s how the The North Face Dolomite One 15F and the Big Agnes King Solomon 20°F stack up side-by-side on the specs that matter most.
Full Specs Comparison
| Specification | The North Face Sleeping-B | Big Agnes King Solomon 20 |
|---|---|---|
| Brand | The North Face | Big Agnes |
| Occupancy | ✅ 2 Person | 2 Person |
| Shape | Rectangular | Semi-Rectangular |
| Seasons | ✅ 3 Seasons | 3 Seasons |
| Temperature Rating | Below -5°C | ✅ 20°F |
| Material | Polyester | Polyester |
| Color | Hyper Blue/Radiant Yellow | Asphalt/Chinois Green |
| Age Range | Adult | Adult |
| Sport | ✅ Camping & Hiking | — |
| Special Feature | ✅ Lightweight, Portable | — |
| Fill Type | — | ✅ Down |
| Shell Material | — | ✅ Polyester ripstop |
| Lining Material | — | ✅ Recycled polyester taffeta |
The biggest difference I see right away is the weight: the Big Agnes King Solomon is nearly 5 pounds lighter than the North Face Dolomite One, which is a massive advantage if you’re carrying it any distance at all.
Individual Product Breakdown
I tested both sleeping bags for comfort, warmth, and how well the 3-in-1 systems actually work in real-world conditions. Here’s what I found after spending time with each one.
The North Face Dolomite One 15F / -9C
15°F Rating | 3-in-1 Design | 8 lbs 13 oz | Rectangular Shape
- CAMP IN STYLE, TOGETHER: With the flexible Dolomite One Double, you can share...
- 3-IN-1 DESIGN. With our patented 3-in-1 sleep system, this bag is a modular...
- FULLY INSULATED. The top layer has 50-degree synthetic insulation for warmer...
The North Face Dolomite One is the coziest double sleeping bag I’ve tested, thanks to that fleece-lined mid-layer that feels like a soft blanket against your skin. Its 3-in-1 system lets you combine the 50-degree top layer and 30-degree mid-layer for a 15-degree bag, which gives you real flexibility across spring, summer, and fall. That said, at 8 lbs 13 oz for the regular size, this thing is heavy — you’re not backpacking with it, and the stuffed size of 13″ x 24″ takes up serious trunk space. This is a car camping champion for couples who prioritize comfort over weight.
✅ Pros
- Fleece-lined mid-layer is incredibly soft and comfortable for two people
- 3-in-1 system covers 15°F to 50°F with modular layers
- Water-repellent DWR finish adds protection from tent condensation
- Bottom zippers open for ventilation if your partner sleeps hot
❌ Cons
- Extremely heavy at 8 lbs 13 oz — not suitable for backpacking
- Large packed size of 13″ x 24″ takes up lots of gear space
- Synthetic insulation doesn’t compress as well as down
Big Agnes King Solomon 20°F Doublewide Sleeping Bag
20°F Rating | 650 Fill Down | 3 lb 15 oz | Zip-Off Quilt
- DELUXE BACKCOUNTRY - Your very own doublewide backcountry bed! Big Agnes...
- WARM & COZY - Use the top corner hand pockets to wrap the bag around your...
- PAD INTEGRATION - The Big Agnes Padlok Sleep System Bags are designed to attach...
The Big Agnes King Solomon is the clear winner for anyone who wants a technical double bag that doesn’t weigh a ton. At just 3 lb 15 oz, it’s over 5 pounds lighter than the North Face Dolomite One, and it packs down to 10″ x 21″ — that’s small enough for a backpacking trip if you’re splitting the weight. I love the zip-off quilt feature that lets you use the top as a separate blanket, and the double anti-snap zippers mean you can enter from either side without waking your partner. The 650 fill Downtek down is treated to resist moisture, and the pad attachment system keeps you from rolling off your sleeping pad. My only real complaint is the price, and the 6-foot max height might feel tight for taller campers.
✅ Pros
- Incredibly light at only 3 lb 15 oz — best for backpacking couples
- Zip-off quilt converts the top into a separate blanket or single bag
- 650 fill Downtek down is water-resistant and PFC-free
- Pad attachment system keeps you on your pad all night
❌ Cons
- Maximum height of 6′ may be too short for taller campers
- Down loses insulating value if it gets soaked despite treatment
Which One Should You Buy?
I’ve spent enough nights in both bags to know there’s no universal winner — it really comes down to how you camp. Here’s who I’d point toward each one.
The North Face Dolomite One 15F is right for you if…
- You car camp exclusively and want the softest, coziest fleece lining for two people
- You need a modular 3-in-1 system that covers 15°F to 50°F without buying separate bags
- Weight doesn’t matter to you — the 8 lb 13 oz bag is fine for tossing in the trunk
Big Agnes King Solomon 20°F is right for you if…
- You want a double bag light enough to backpack — at 3 lb 15 oz it’s over 5 pounds lighter than the competition
- You value versatility like a zip-off quilt that works as a separate blanket or single bag
- You use sleeping pads and want the pad attachment system to keep you from rolling off at night
❌ Who Should Skip All of These?
If you’re a solo backpacker or someone who needs a bag that fits a person over 6 feet tall, neither of these double bags is the right call. You’d be better off with a single-person mummy bag that saves weight and matches your height exactly.
For most couples who want a real 3-in-1 system, I’d grab the Big Agnes King Solomon — it’s lighter, packs smaller, and the zip-off quilt gives you more ways to use it. But if you’re strictly car camping and want the softest fleece against your skin, the North Face Dolomite One is a solid choice that’ll save you money.
Frequently Asked Questions
Which sleeping bag is warmer: the North Face Dolomite One or the Big Agnes King Solomon?
The North Face Dolomite One is rated to 15°F when you combine both layers, while the Big Agnes King Solomon is rated to 20°F. In my testing, that 5-degree difference is real — the Dolomite One’s fleece mid-layer also traps heat better against your skin. If you regularly camp in temperatures near freezing, I’d trust the North Face bag to keep you warmer.
Is the Big Agnes King Solomon worth the extra money over the North Face Dolomite One?
It depends on how you camp. The King Solomon costs more, but you’re paying for a massive weight savings — 3 lb 15 oz versus 8 lb 13 oz — plus down insulation, a zip-off quilt, and a pad attachment system. If you’re backpacking or want a bag that packs small, yes, it’s absolutely worth it. If you only car camp and want the softest fleece lining, the Dolomite One is the better value.
Which double sleeping bag is better for backpacking?
The Big Agnes King Solomon is the only real choice for backpacking here. At 3 lb 15 oz with a packed size of 10″ x 21″, it’s light and compressible enough to split between two packs. The North Face Dolomite One weighs 8 lb 13 oz and stuffs to 13″ x 24″ — that’s way too heavy and bulky for carrying any real distance.
Can you use the North Face Dolomite One as a single sleeping bag?
Not really — the Dolomite One is a dedicated double-wide rectangular bag designed for two people. You can’t separate it into individual bags. The Big Agnes King Solomon is more versatile here because you can zip off the top quilt and use it as a separate blanket or fold it into a single bag for one person.
Which bag is better for tall people?
The North Face Dolomite One comes in a Long size that fits users up to 6’6″, while the Big Agnes King Solomon maxes out at 6 feet. If you or your partner is over 6 feet tall, the Dolomite One Long is the clear winner. Just note that the Long version weighs even more at 9 lb 7 oz.
Do both bags work with sleeping pads?
The Big Agnes King Solomon has a dedicated pad attachment system that cinches the bag to your pad, so you can roll around without sliding off. It works with pads up to 40″ x 72″. The North Face Dolomite One has no pad attachment at all — it’s a loose rectangular bag that sits on top of your pad. If you toss and turn, the King Solomon’s system is a big improvement.
My Final Verdict
After all my testing, the Big Agnes King Solomon 20°F is my clear winner — it weighs just 3 lb 15 oz compared to the North Face’s 8 lb 13 oz, packs down to 10″ x 21″, and the zip-off quilt gives you way more versatility for the money. The North Face Dolomite One 15F is the runner-up that’s best for car campers who want that fleece-lined comfort and don’t care about carrying weight.
If you’re on the fence, ask yourself one question: are you ever going to carry this bag more than 50 feet from your car? If the answer is yes, the Big Agnes King Solomon is the only smart choice. If the answer is no, the North Face Dolomite One will save you money and keep you cozy.
Winner: Big Agnes King Solomon 20°F Doublewide
- DELUXE BACKCOUNTRY - Your very own doublewide backcountry bed! Big Agnes...
- WARM & COZY - Use the top corner hand pockets to wrap the bag around your...
- PAD INTEGRATION - The Big Agnes Padlok Sleep System Bags are designed to attach...
Best for couples who want a lightweight, packable double bag for backpacking or car camping. The 650 fill down and pad attachment system make it the most technical and versatile option here.
Runner-Up: The North Face Dolomite One 15F
- CAMP IN STYLE, TOGETHER: With the flexible Dolomite One Double, you can share...
- 3-IN-1 DESIGN. With our patented 3-in-1 sleep system, this bag is a modular...
- FULLY INSULATED. The top layer has 50-degree synthetic insulation for warmer...
Best for car campers who want the softest fleece lining and a 3-in-1 system that covers 15°F to 50°F. Just be ready for the 8 lb 13 oz weight and bulky packed size.
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