Comfort
Warmth / Weight
Packed Size
Durability
Ease of Use
Sustainability
Type
Air
R-value
3.8
Weight
1 lb. 8.5 oz.
Packed Size
9.4 x 4.7 in.
Thickness
3.1 in.
Fabric(s)
75D polyester
Pros
Cons
Rab Stratosphere 4
For this season's top models, see our guide to the Best Backpacking Sleeping Pads.
The Rab Stratosphere 4 lands squarely in the middle of the pack when it comes to comfort—supportive enough for a decent night’s sleep, but not especially plush compared to top-tier pads. At 3.1 inches thick, it falls short of standout models like the Nemo Tensor All-Season and Big Agnes Rapide SL (both 3.5 in.), and I found its wide vertical baffles less comfortable than the smaller box-style baffles found on more premium sleeping pads.
That said, I was genuinely surprised by how well the Rab Stratosphere 4 supported me while side sleeping—my hips never touched the ground, even on rocky terrain. As someone prone to pressure points, that felt like a win. The pad is also impressively quiet—none of the crinkly noise that often plagues lightweight air pads. Still, given the weight and price, there are cushier, more supportive options.
The Rab Stratosphere 4 doesn’t impress when it comes to warmth for the weight. With a 3.8 R-value, it’s adequate for summer backpacking but falls short for colder shoulder-season trips—and it’s definitely not built for winter use. The bigger issue is its weight: at 1 pound 8.5 ounces, you’d expect more insulation in return.
There are simply more efficient backpacking sleeping pads out there. The Nemo Tensor All-Season weighs just 1 pound and packs a 5.4 R-value. The Therm-a-Rest NeoAir XLite delivers a 4.5 R-value at just 13 ounces, and the Big Agnes Rapide SL manages a 4.8 R-value at 1 pound 2 ounces. Even the budget-friendly Big Agnes Divide Insulated offers a similar 4.0 R-value for less weight. Bottom line: the Stratosphere’s warmth-to-weight tradeoff doesn’t stack up well against the competition.
The Rab Stratosphere 4 falls right in the middle of the pack when it comes to packability. With a packed size of 9.4 by 4.7 inches, it’s certainly compact enough for backpacking, though it will be a tighter squeeze in an ultralight setup. For comparison, the Stratosphere is a bit bulkier than category leaders like the Big Agnes Rapide SL (7 x 4 in.) and Therm-a-Rest NeoAir XLite NXT (9 x 4.1 in.), and roughly on par with other midrange pads like the Exped Ultra 5R (9.1 x 4.9 in.). Overall, its size makes it a decent crossover choice—compact enough for the trail, but not too minimal for car camping either.
The Rab Stratosphere 4 is one of the most rugged backpacking sleeping pads on the market, thanks to its burly 75-denier polyester construction on both the top and bottom. That’s thicker than even some car camping pads, and significantly more robust than the typical 20D to 40D range found in most lightweight backpacking models. For reference, even top-tier pads like the Therm-a-Rest NeoAir XTherm only use 30D on top, and very few models match the Stratosphere’s full 75D build.
That toughness translated to confidence in the field—I had no hesitation sitting, shifting, or even cooking next to the Stratosphere during a wet, rocky basecamp stay. It doesn’t deliver class-leading warmth or plush comfort, but for rough terrain or rowdy conditions, it’s an excellent choice. If you’re looking for one pad that can handle both car camping and backpacking without babying it, the Rab Stratosphere 4 is a compelling, peace-of-mind pick.
The Rab Stratosphere 4 is fairly straightforward to use, but a few design quirks hold it back from feeling truly refined. It comes with a pump sack—always a welcome addition—but like many others on the market, I found it awkward and inefficient. It took some effort to get a good seal, and more often than not, I resorted to finishing inflation by blowing directly into the valve. The two-way valve itself works fine but has a cheap, plasticky feel that doesn’t inspire a ton of confidence, especially compared to the smoother, more robust systems on higher-end backpacking sleeping pads.
One bright spot is the pad’s side-loading roll-top stuff sack. It’s generously sized and makes packing up noticeably easier than the usual top-loading compression bags, which often feel like an unnecessary battle at the end of a long hike. Overall, while the Stratosphere 4 won’t cause major headaches in the field, it doesn’t offer the polished, user-friendly experience we’ve seen from some of its closest competitors.
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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.
Recycled Materials
Recycled materials are prevalent in outdoor gear, with nylon, polyester, wool, and down among the most common, but the composition varies widely. A green check mark indicates the product is made with a substantial amount of recycled materials (100% recycled or the core fabric that makes up most of the product is recycled), a yellow check means it contains a moderate to small amount of recycled materials, while a red X means there are no recycled materials in the product.
Bluesign Approved
Bluesign Technologies, based in Switzerland, operates a third-party textile management system that ensures materials are manufactured to strict environmental, chemical, and worker safety standards. A green check mark indicates a product is either a Bluesign Product (contains at least 90% Bluesign-approved fabrics and 20-30% Bluesign-approved accessories) or features a significant amount of Bluesign-approved materials. A yellow check mark means it uses some Bluesign-approved materials but less than the aforementioned category, and a red X means there are no Bluesign-approved materials in the product.
Repair Kit
Repair kits help extend a product’s lifespan by allowing users to quickly fix issues—like sleeping pad punctures or damaged inflation valve seals—rather than replace the item entirely. A green check indicates the product includes a repair kit, while a red X means it does not.
Responsible Manufacturing
This criterion evaluates a brand’s commitment to fair wages, safe working conditions, and reducing environmental impact through certifications and programs like Fair Trade Certified, Fair Wear Foundation, Worldwide Responsible Accredited Production (WRAP), and the Fair Labor Association, while also recognizing brands that manufacture primarily in the U.S. or Europe under strict labor and environmental regulations. A green check mark indicates a brand meets our responsible manufacturing criteria, while a red X means it does not.
Recycled and/or Reduced Packaging
Packaging can add significant waste to outdoor gear purchases, so many brands work to reduce its impact by using recycled materials, incorporating Forest Stewardship Council-certified paper products, and minimizing plastic and paper use. A green check mark indicates a brand uses recycled or reduced materials across all of its packaging, a yellow check indicates moderate or limited use of recycled or reduced packaging, and a red X indicates the brand does not make either of these efforts.
Repair Services
Repair services extend the lifespan of outdoor gear and reduce overall consumption, though programs vary widely. Some brands offer comprehensive repairs for a range of issues, while others provide limited or no repair support. A green check mark indicates a robust repair program, a yellow check mark indicates limited repair services, and a red X indicates the brand does not offer repair services.
Carbon Footprint Tracking
This criterion evaluates whether a brand measures, reports, and works to reduce its greenhouse gas emissions using established frameworks such as the Higg Index, Greenhouse Gas Protocol, or The Change Climate Project. A green check mark indicates a brand publicly reports greenhouse gas emissions data, sets clearly defined reduction targets, and uses established tracking frameworks such as Higg or The Change Climate Project. A yellow check mark indicates the brand tracks emissions and outlines reduction goals but provides limited data, lacks science-based verification, or does not clearly report progress. A red X indicates the brand does not appear to track greenhouse gas emissions or provides so little information that its efforts cannot be verified.
Annual Impact Report
Annual impact reports provide transparency and accountability by outlining a brand’s sustainability efforts across areas such as material sourcing, greenhouse gas emissions, waste, water use, supply chains, and packaging. A green check mark indicates a brand publishes a detailed, brand-specific impact report that closely aligns with our sustainability criteria and leaves little room for ambiguity. A yellow check indicates a brand provides some relevant sustainability reporting but lacks detail in key areas or is covered only briefly within a parent company report. A red X indicates a brand does not regularly publish an impact report.
The Rab Stratosphere 4 comes in three sizes—regular (72 x 20 in.), regular wide (72 x 25 in.), and long wide (77 x 25 in.)—offering solid options for different body types and sleeping styles. I’m 5’9” (174 cm) and typically use a regular-sized pad, but for this review, I opted for the regular wide, and I’m glad I did. The extra width gave me a surprising amount of room to sprawl—I had about a third of the pad to spare in width, which made side sleeping and moving around at night feel much more comfortable and unrestricted.
My husband and I—both medium build—even tried sharing the pad briefly. It worked fine if we were cuddling or spooning with my head on his shoulder, but lying at opposite ends wasn’t really doable. For solo use, though, the regular wide felt spacious and ideal, particularly for back or side sleepers who want a little more wiggle room without stepping up to a double pad.
Big Agnes Rapide SL Insulated ($170): Well-Rounded Value Pick
When stacked up against the Rab Stratosphere 4, the Big Agnes Rapide SL Insulated takes the lead across nearly every metric—comfort, weight, warmth, and packability. For $30 more, the Rapide SL is lighter (1 lb. 2 oz.), thicker (3.5 in. with 4.25-in. raised side rails), and warmer (R-value 4.8), while also packing down smaller than any other pad in our test (7 x 4 in.). It’s simply more pad for less money. That said, the one area where it lags behind the Stratosphere 4 is durability. Big Agnes does not provide a denier spec, but its safe to say its fabric is significantly thinner than that of the Statosphere. But unless you consistently sleep on rough terrain and want maximum abrasion resistance, the Rapide SL is the smarter, more comfortable, and more versatile choice. For more, read our review of the Big Agnes Rapide SL Insulated.
Therm-a-Rest NeoAir XTherm ($230): Durability at a Low Weight
If you’re after maximum warmth and minimal weight without sacrificing durability, the Therm-a-Rest NeoAir XTherm is one of the best in the game. It matches the Rab Stratosphere’s 70D bottom for ruggedness but saves weight with a 30D top, resulting in a total weight of just 15.5 ounces (over a half-pound lighter than the Stratosphere). It’s also vastly warmer, with a winter-ready R-value of 7.3 compared to the Stratosphere’s mild-weather 3.8. You’ll pay almost $100 more for the performance, but for high-altitude missions or cold-weather backpacking where weight, warmth, and reliability matter most, it’s a better-executed package. For more, read our Therm-a-Rest NeoAir XTherm review.
This pad is Rab’s entry into the value air pad category, and its durability deserves praise. Otherwise, the Stratosphere 4 is middle-of-the-road in other key performance categories, and we think there are better budget pad options on the market.
Comfort
Warmth / Weight
Packed Size
Durability
Ease of Use
Sustainability
The Rapide SL Insulated proves that standout comfort doesn’t always need a big price tag to match. This pad’s cushion, warmth, and weight should make it appealing for a wide variety of backpackers, although we’d prefer a larger stuff sack.
Comfort
Warmth / Weight
Packed Size
Durability
Ease of Use
Sustainability
Thanks to its fantastic insulation, the NeoAir XTherm is a longstanding favorite of winter alpinists and high-altitude climbers. It’s also more durable than comparable pads. However, it’s one of the most expensive models on the market and overkill for warm-weather outings.
Comfort
Warmth / Weight
Packed Size
Durability
Ease of Use
Sustainability
The Rab Stratosphere 4 is a great pick for backpackers and campers who value durability above all else. With 75-denier fabric on both the top and bottom, it’s one of the most rugged sleeping pads we’ve tested—ideal for rocky campsites, cowboy camping, or anyone who doesn’t want to baby their gear. But the toughness comes at a cost: the Stratosphere’s 3.8 R-value relegates it to summer and mild shoulder-season trips; at over 1.5 pounds, it’s heavier than average. If you’re looking for an all-season ultralight, this isn’t it, but if durability and simplicity are your top priorities, the Stratosphere 4 delivers solid comfort and peace of mind in rough terrain.
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