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Sea to Summit Comfort Deluxe Double Review

ByMultiple Authors
May 27, 2025
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Our Take:
4.1/5
The Comfort Deluxe Double delivers a home-like feel with thick foam, a soft topper fabric, and generous dimensions that comfortably fit two sleepers. At 51 inches wide, it rivals a full-size bed, and overall comfort is excellent. That said, it falls just short of the top-tier alternatives in warmth and durability. It’s also tough to pack away, and notably lacks a pump sack despite its premium price. Still, for comfort-focused couples, it remains a strong contender.
Comfort

Comfort

4.5/5
Warmth

Warmth

4/5
Durability

Durability

3.5/5
Ease of Use

Ease of Use

3/5
Weight & Packability

Weight & Packability

2/5
Sustainability

Sustainability

2/5

Dimensions

79 x 51 x 4 in.

Type

Self-inflating mat

R-value

6.5

Weight

9 lb. 13 oz.

Pros

Thick foam and soft top fabric lend it a winning home mattress-like feel.
Durable bottom material can handle iffy campsite placement.
Combo inflation/deflation valves are easy to use and intuitive.

Cons

Hard to fully deflate and pack into its stuff sack.
Lack of pump sack is insulting at this price level.

For this season's top models, see our guide to the Best Camping Mattresses.

The Sea to Summit Comfort Deluxe Double lives up to its name with a luxurious and supportive build that rivals the best camping mattresses we’ve tested. At 4 inches thick, it hits the comfort benchmark for high-end mats and offers excellent cushioning and ground isolation—even for side sleepers. The foam has a soft, premium feel that’s reminiscent of an at-home mattress topper: plush but not overly squishy, with just the right amount of support. The felt-like surface is cozy against the skin, and vertical sidewalls help maximize usable space across the entire rectangular 79-by-51-inch platform.


Sharing the mat with a partner felt natural, with enough width that I wasn’t jostled awake when my husband shifted around. The setup feels equivalent to placing two 25-inch-wide pads together, minus the annoying center gap. We’d still give a slight edge in plushness to the memory foam-like build of the Exped MegaMat Duo and the two-layer Hest Foamy, but the Sea to Summit Comfort Deluxe is undeniably one of the most comfortable double-wide mats on the market. Bonus points for thoughtful touches like pillow-securement Velcro at the head.

With an R-value of 6.5, the Sea to Summit Comfort Deluxe Double offers solid warmth for three-season and light winter camping. It’s right in line with similar luxury camping mattresses like the REI Camp Dreamer XL (6.6) and slightly below the Exped MegaMat Duo (8.1), but still warm enough to keep most sleepers comfortable in temps well below freezing. During testing in 40–45°F conditions, we paired the mat with a 20-degree double quilt and never once felt cold seeping in from underneath.


While it might not be the best choice for deep-winter camping in sub-20°F temps, the Comfort Deluxe delivers trustworthy insulation for the vast majority of car campers. The thick foam construction holds heat well, and unless you're planning trips into the single digits, this mat should be plenty warm for year-round use.

The Comfort Deluxe Double offers good—but not standout—durability for a premium camping mattress. Its 75-denier polyester base is in line with top competitors like the Exped MegaMat Duo and Nemo Roamer, but the 30-denier polyester top is thinner than most. Many alternatives opt for 50- or even 75-denier tops, which makes the Sea to Summit a bit more vulnerable to wear and damage—especially if you camp with dogs or active kids who may be rougher on gear.


On the bright side, the inflate/deflate valves are impressively solid and easy to use, and the mat comes with a repair kit that includes patches and a tube of silicone adhesive. While it doesn’t quite match the bomber feel of the Exped MegaMat Duo, the Comfort Deluxe is still a well-made and reasonably durable mat for the price, and it doesn’t hurt that it undercuts the Exped by about $30.

The Sea to Summit Comfort Deluxe Double is easy to operate once you understand its dual-valve design, but it comes with some notable convenience tradeoffs. Each of the two valves has both inflate and deflate settings—simply twist the wing to “inflate” to start self-inflation or “deflate” to release air. This system is intuitive and worked reliably throughout testing. However, the first-time setup was slow; the vacuum-sealed foam took three full days to expand out of the box, and even on subsequent trips, we found it took 30 minutes or more to fully inflate on its own.


Unlike some competitors, Sea to Summit doesn’t include a pump sack, which is disappointing for a $399 mattress—especially if you’re trying to quickly top it off after dark or in cold weather. Finally, the included top-loading stuff sack is snug and tricky to repack. While not impossible, getting the mat back in can take a few grunts and retries, and we wish it were more forgiving or side-loading like the stuff sack that comes with the Exped MegaMat.

Like most double-wide camping mattresses, the Comfort Deluxe Double comes with a real penalty in bulk and weight. At 9 pounds 5 ounces, it’s on the heavier end of the spectrum, though not the worst offender—Exped’s MegaMat Duo LW+ weighs 9 pounds 11 ounces, while Nemo’s Roamer Double is a bit more manageable at 7 pounds 8 ounces. Packed size is decent for the category at 27 x 10 inches, comparing favorably to the MegaMat Duo (27.6 x 11.8 in.) and nearly matching the Roamer (11 x 26 in.).


That said, this is still a large item to store and transport. If you’re working with limited trunk space, a small car, or just want to streamline your gear closet, it could be a tight squeeze. But for campers who can handle the extra bulk, the tradeoff is a supremely comfortable sleeping experience that many will find well worth the space.

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Longevity

Choosing durable outdoor gear and keeping it in use for longer is one of the best ways to reduce environmental impact. Our proprietary longevity rating assesses factors like overall build quality, materials, fabric denier, component durability, and real-world performance. A green check indicates that we expect the product to be long-lasting relative to its peers, a yellow check mark indicates average longevity, and a red X indicates a product that may have a limited lifespan.

Exped MegaMat Duo LW+ ($419): Top of the Heap
The MegaMat Duo is the Comfort Deluxe Double’s most direct competition, and we think it’s slightly better. We should note, however, that the “regular” MegaMat Duo is only 41 inches wide, and so the more analogous version is the “LW+,” which measures 52 inches across. That’s an inch wider than the Comfort Deluxe Double, and both pads are 4 inches thick and feature self-inflating foam designs that had our testers speeding toward dreamland. The MegmaMat Duo LW+ has a much higher R-value, though (8.1 compared to 6.5), and quality of life features such as a carry handle, an included pump sack, and easier storage. It’s also—somewhat incredibly—even more expensive, at $420 (the regular version is $370). If price is no object, we’d go with the MegaMat. But if $400 is a line in the sand you don’t want to cross, the Comfort Deluxe Double is a great pad. For more, read our review of the Exped MegaMat Duo.


Nemo Quasar 3D Insulated Double ($280): Dialing Back Price and Plushness
The Nemo Quasar 3D Insulated Double alleviates one of our biggest issues with the Comfort Deluxe Double, which is its sky-high price tag. This pad costs over $100 less and might help you free your checkbook up a little for other camping purchases, but be aware that you’ll be giving up quite a bit of comfort. The Quasar 3D is only 3.5 inches thick but is a manually inflating air baffle pad, so its feel is less luxe and supportive than the self-inflating Comfort Deluxe’s foam. That design makes the Quasar 3D a lot lighter—it weighs 3 pounds 6 ounces—and with 30-denier polyester fabric the Quasar 3D is less burly as well, but at least it’s just as wide. This model is a good option for campers who don’t necessarily need the Comfort Deluxe’s premium feel but still want plenty of room.

Sea to Summit Comfort Deluxe Double ($389)
Placing Sea To Summit Comfort Deluxe camping mattress into tent
4.1/5

This pad is luxuriously comfortable, as you might expect from the most expensive model we tested. However, the Comfort Deluxe Double doesn’t quite reach the heights of its main competitor, the Exped MegaMat Duo, due to some small design limitations.

Dimensions
79 x 51 x 4 in.
Type
Self-inflating mat
R-value
6.5
Weight
9 lb. 13 oz.
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Comfort

4.5/5
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Warmth

4/5
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Durability

3.5/5
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Ease of Use

3/5
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Weight & Packability

2/5
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Sustainability

2/5
Exped MegaMat Duo ($450)
Camper in sleeping bag laying on the Exped Megamat Duo sleeping mattress
4.6/5

This double-wide pad is the ultimate sleep platform for outdoorsy couples or solo campers who want to max out their sleeping space. The MegaMat is plush, warm, and supportive, and the new version has some welcome design updates. If only it were less expensive and easier to inflate.

Dimensions
78 x 52 x 4 in. (LW+)
Type
Self-inflating mat
R-value
8.1
Weight
9 lb. 11.2 oz.
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Comfort

5/5
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Warmth

5/5
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Durability

4/5
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Ease of Use

3/5
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Weight & Packability

2/5
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Sustainability

4.2/5
Nemo Quasar 3D ($180)
Nemo Quasar 3D Insulated sleeping pad placed in the tent
3.6/5

The Quasar 3D Insulated is the only pad we tested that’s a true backpacking/car camping hybrid. It offers a healthy dose of durability and support (for an air pad, at least), although it’s not very warm and way less comfy than true car camping models.

Dimensions
72 x 25 x 3.5 in. (RW)
Type
Air pad
R-value
3.3
Weight
1 lb. 14 oz.
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Comfort

2.5/5
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Warmth

2.5/5
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Durability

2.5/5
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Ease of Use

4/5
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Weight & Packability

5/5
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Sustainability

4.9/5

Is the Comfort Deluxe Double for You?

Sea to Summit’s Comfort Deluxe Double is a premium two-person camping mattress that offers excellent comfort, support, and warmth for car campers who prioritize a great night’s sleep. Its spacious rectangular shape, 4 inches of plush foam, and thoughtful details like vertical sidewalls and pillow attachment points make it one of the most livable designs in its class. While competitors like the Exped MegaMat edge it out in overall comfort, warmth, and durability, the Sea to Summit Comfort Deluxe holds its own—and it doesn’t hurt that it costs slightly less—making it a well-rounded and compelling option for couples.

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