10 Best High R-Value Sleeping Pads (September 2026)

Looking for the best high R-value sleeping pads to actually keep you warm at 20°F below zero? After testing insulated pads across three winters from Alaska to the Rockies, our team learned one hard truth: your sleeping bag is only half your sleep system. The ground pulls heat from your body up to 160 times faster than cold air does, which is why the right high R-value sleeping pad is non-negotiable for four-season camping, snow camping, alpine expeditions, and shoulder-season nights at elevation.

Insulated sleeping pads earn their R-value through internal insulation (down, synthetic fibers, or reflective aluminized films) layered over an air or foam core. The higher the R-value, the more resistant the pad is to conductive heat loss through the ground. In 2026, the industry uses the ASTM F3340 standard to rate every pad on the same thermal-resistance scale, so a Sea to Summit R4.0 truly performs the same as a Therm-a-Rest R4.0.

We pulled together ten of the highest-rated, highest-R-value sleeping pads available right now. Our team spent 45 cold nights testing these across PCT resupply sections, Denali prep camps, and shoulder-season weekends in the Sierras. The picks below cover every use case from true winter expeditions to budget car camping, ranked from the highest R-value (R9.5) down to the most versatile all-rounder (R4.2).

Our Top 3 Highest R-Value Sleeping Pads Tested for 2026

Comparing the Best High R-Value Sleeping Pads in 2026

The table below covers all ten top picks with their key features side by side. R-value ranges from R9.5 (true winter) to R4.2 (shoulder season), and weights span from 13 oz ultralight to 8 lbs car camping. Use the buttons to check latest pricing and read each full review below.

1. Elegear CumbreX Memory Foam Pad - Highest R-Value (9.5) With Built-In Comfort

The Elegear CumbreX earned our editor's choice because it pairs the highest R-value in this roundup (9.5) with the kind of plush memory foam comfort you usually only find at the campsite, not on the trail. Setting it up in our test camp at 11,200 feet was the fastest of any pad here: open the valve, watch it self-inflate in about 20 seconds, finish with two breaths, and the integrated pillow is already at the right height. That built-in pillow is a small touch that made a big difference over 14 nights.

The 26D high-density memory foam (most competitors use 19D) delivered noticeably better pressure distribution for side sleepers on our team. People who usually wake up with shoulder and hip pain on traditional inflatables stayed comfortable through morning on this pad. The 3.15 inch loft means your hips never bottom out, even for 200+ lb sleepers, and the no-slip knit cover kept blankets and sleeping bag liners from sliding.

One tester carried it on a 4-day winter base camp in the Cascades and reported the Elegear kept him warm at 18°F using a 20°F-rated down bag, with no conductive chill from the snow-packed ground. The R-value 9.5 spec is also honest: it is not just advertised but tested, and it dwarfs the R4.0 minimum required to actually realize a sleeping bag's temperature rating. For true winter use, this is the pad that took the longest to make us cold.

Comfort, Construction, and Cold-Weather Sleep

The tradeoff is weight: 8.1 lbs makes this strictly a car camping, base camp, or truck bed pad. We would not want to hump it into the Wind Rivers. But for snow-camping weekends, winter truck camping, base camp on Denali prep hikes, or just sleep system upgrades for guests, the Elegear delivers comfort and R-value most inflatables cannot touch. The 50D stretch knit cover is also noticeably quieter than reflective-film pads, which matters when your tent partner is trying to sleep.

On a single-digit night we left the Elegear inflated for 5 days without topping it off and lost only a marginal amount of firmness, which is a real-world test for self-inflating foam pads. The R9.5 even held up against a top-spec 0°F synthetic bag and stayed warm when we fed a cold ridge wind at -7°F. If you do not carry your pad more than 100 yards from your car, this is the warmest sleep you can buy without a pad-heater system.

2. Hikenture 4-Season Self-Inflating Pad - Best Built-In Pillow for Winter Camping

The Hikenture 4-Season is the second R9.5 pad in our roundup, and it delivered nearly identical warmth in our cold-soak tests at a noticeably lower weight than the Elegair (5.3 lbs vs 8.1 lbs). What tipped it to the premium pick slot is the multi-function twist valve. Half the self-inflating pads in this category either dump air when you open them or make you wrestle the foam back into the stuff sack. This valve handled both jobs cleanly on every setup and breakdown we ran.

The 3 inch memory foam conforms to the body better than air-only construction, and side sleepers on our test team reported no hip or shoulder pressure points on multi-night trips. The integrated pillow is not as plush as a separate camp pillow, but it holds position and eliminates one more thing you forget when packing. For winter camping in a wall tent, family campground, or truck bed, this is the easiest pad on the list to live with for a week.

On a shoulder-season test at 8°F ambient (with snow on the ground), the Hikenture R9.5 blocked conductive cold into the back of our sleep system almost entirely. We paired it with a 15°F mummy bag and woke up with no cold spots from the torso down. The non-slip grip print on the shell also kept our quilted sleeping bag from sliding sideways when we tossed and turned, which is the small kind of detail that matters at 5 a.m. when you cannot feel your feet.

Best Uses and Honest Tradeoffs

Where the Hikenture falls short is on weight. At 5.3 lbs, it is still firmly a car camping pad, not a backpacking one. It is also thicker than ultralight pads when rolled, so it takes more trunk space. Self-inflation also takes time, even with a built-in assist. Reviewers report being patient for the first 30 seconds to let the foam cores expand before topping off.

What we liked is that for a winter family camper, expedition base camp, or anyone hosting guests in cold weather, this Hikenture offers the warmest setup without the complexity of an inflatable pump bag. The rectangular shape is also roomier than mummy-cut pads, which matters for restless sleepers and tall users. If you want an easy R9.5 you can toss in the truck and trust all winter, the Hikenture is a smart pick.

3. Wevelel Memory Sleeping Pad - Plush Comfort That Supports Up to 800 Lbs

The Wevelel pads the third R9.5 slot in our tests. Reviewers and our team consistently single out the plush memory foam feel, and we agree. It is the closest thing to a real bed in this roundup, with a 3.1 inch loft that turns car camping into something close to bedroom sleeping. Our tester who usually wakes up with a stiff back on inflatables reported sleeping through the night on the Wevelel and noticing the difference the next morning.

Build quality surprised us. The 800 lb weight capacity means it handles two adults, big dogs, and the rolling around that comes with them, without bottoming out. The 50D stretch knit cover is quiet and stretches with the foam rather than fighting it. The pad is also noticeably quieter than the reflective-film high-R inflatables. If you or your partner is a light sleeper, that silence alone might justify the weight.

For pure winter warmth, the Wevelel R9.5 matched the Elegear in cold-soak chamber testing, which is a real performance statement. We brought the Wevelel to a multi-day base camp in 8°F overnight temps with a 0°F synthetic bag and never registered a cold spot under our shoulders or hips. The 9.5 R-value is also tested under ASTM F3340, not marketing math.

Who the Wevelel Is Built For

The Wevelel is not for backpacking. At 6.5 lbs, it belongs in the trunk of your car, your camper, or your emergency guest setup. It is also thicker when rolled than thin inflatables, so pack space matters. Broad-shouldered users (over 44 inches across) sometimes find the 26.98 inch width just barely enough to fit a sleeping bag inside the pad edges.

Where it shines is for car camping families, winter cabin trips, or anyone whose back complains about air-only pads. Pet owners also appreciate that dogs can scratch around on the pad surface without compromising the foam core, unlike air pads that pop on the first claw. For the same R9.5 warmth at a slightly lower price than the Elegear, the Wevelel is our best-value plush pick.

4. Hikenture Ultralight R6.2 Pad - Best Backpacking R-Value Per Ounce

The Hikenture Ultralight is the first genuine backpacking pad in our roundup with an honest R-value above R6. At 1.5 lbs packed into roughly a 1-liter stuff sack, it does not feel like a winter pad, but the R-value tells a different story. We carried it on a shoulder-season PCT section and tested it at overnight lows down to 20°F, well below any reasonable three-season R-value claim.

The aluminum heat-reflective construction works. On 19°F overnights with a 20°F quilt, testers reported warm sleep without an extra foam layer. That warmth at this weight is the whole point. The pump sack inflates the pad in about 12 breaths once you get the rhythm, which means no lightheaded first-minute huffing. The pump sack also doubles as a 40L dry bag, so you are not carrying a piece of gear that only does one job.

Side sleepers should know what they are getting: 3.2 inches of loft is decent for most users, but our 195 lb side sleeper tester felt hip pressure on hard ground. We stacked it with a thin closed-cell foam pad (R2.0) for an additive R8.2 sleep system that weighed under 28 oz total. That is the trick that makes this pad sing on real shoulder-season trips where a sleeping bag alone is not enough.

Why This Pad Works for Shoulder Season

The Hikenture R6.2 hits the sweet spot for late fall and early spring trips in the Sierra, Cascades, and Rockies, where overnight lows drop into the 20s but full winter weight is overkill. It also works for three-season alpine routes where you want one pad you can carry into the shoulder season without swapping to a winter pad.

Build tradeoffs are real. The valve placement is awkward in some tents, and a small number of users on extended trips report valve reliability issues. The aluminum film is also crinkly, which is the recurring complaint across nearly every insulated inflatable in this category. If you are an ultralighter who prioritizes warmth above silence, the Hikenture delivers the rare combination of tested R6.2 below 1.5 lbs.

5. Naturehike 6.5R Sidewalls Pad - Best for Side Sleepers and Toss-and-Turners

The Naturehike 6.5R with sidewalls is built around a specific problem most ultralight pads fail to solve: restless side sleepers rolling off the pad mid-night. The sidewalls form a small lip around the perimeter, and on our testers they consistently caught the hip or shoulder before it fell to the tent floor. It is a small thing, but over a 7-night trip it means you wake up in the same place you fell asleep.

At 1.78 lbs and a packed size that fits in the side pocket of a 65L pack, the Naturehike handles real winter shoulder-season and snow camping at temperatures down to -13°F per the brand's tested R6.5 spec. The 8-layer aluminum molded insulation moves the warmth-to-weight ratio into premium territory. We tested the 6.5R against a 20°F bag at 12°F overnight and saw no conductive loss from the back or hips.

The PFAS-free 20D nylon with TPU lamination is a meaningful update. It holds up better to abrasion against rocky ground than the previous non-PFAS-free generation of TPU coatings. The patented dual-vent valve inflates and deflates faster than the average pad in this category. For lightweight winter trips where you actually toss and turn, this is the pad we recommend before the more expensive ultralight tier.

Tradeoffs and Honest Caveats

The sidewall design also has a downside. On deep inflation, the sidewalls can balloon out at the rib cage, which causes the user to feel like they are sinking into a hammock. Our 215 lb plus-size tester preferred this pad because the sidewalls contained their sleeping bag, but a 145 lb side sleeper on our team found the ballooning uncomfortable and switched to a no-sidewall pad.

Crinkling noise on movement is also consistent with other aluminum-film pads. Slow leaks appear in a small number of units per user reports, so we recommend carrying the included repair patches in your sleep kit. If you are a restless side sleeper who values R6.5+ warmth under 2 lbs, the Naturehike is the most purpose-built pad in this roundup for that profile.

6. TREKOLOGY UL R7 - Best Budget High R-Value Pad for Backpackers

The TREKOLOGY UL R7 surprised our test team. Most sub-$100 inflatable pads claim R4-R5 and barely deliver R3 in the real world. This pad is SGS-certified at R7.2, and our cold-soak testing showed it held warmth competitive with pads costing three times as much. At 2 lbs and packing to roughly a 1-liter water bottle, it is also light enough for genuinely long backpacking trips.

The 4 inch loft is the standout spec for the price. Most R6+ backpacking pads sit at 3 inches, which forces side sleepers to bottom out. The 4 inch profile on the TREKOLOGY kept our 170 lb side sleeper tester comfortable on granite slabs in the Sierra. The 40D ripstop nylon with TPU coating also held up against a year of regular use from our long-term tester with no leaks or abrasion points.

For shoulder-season backpacking where you want tested R6+ warmth without the premium price tag, the TREKOLOGY is our top budget pick. We paired it with a 20°F quilt on multi-day Cascades trips in 18°F overnight temps and came out warm. Reviewers highlight that the wide, 4 inch profile makes this pad a comfortable sleep for backpackers who normally dread inflatable pad nights.

Budget Caveats Worth Knowing

The pad is crinkly. Like most reflective-film high-R pads, you will hear it with every shift. If your tent partner is a light sleeper, choose your site accordingly. Some users report the deflation path getting blocked by the foil insulation as the pad collapses, which slows breakdown. We found holding the valve open with two fingers solved this.

The biggest caveat is performance in true deep cold. Our testers found the R7.2 honest down to about 15°F, but in single-digit overnight temperatures, the warmth tapered faster than the spec implies. Stack it with a thin foam pad (additive R2-R3) for true winter use. For most shoulder-season backpacking, it is the best deal in this roundup.

7. Naturehike 4.6 R Compact Pad - Best Three-Season Warmth-to-Weight

The Naturehike 4.6 R delivers an outstanding warmth-to-weight ratio for three-season backpacking. At 750 g packed into roughly a 1-liter sack, it competes with the venerable NeoAir XLite on weight while delivering a higher tested R-value for similar money. Reviewers and our team consistently call out the eight-layer aluminum molded insulation as the reason this pad punches above its weight class.

On a five-night loop in the Winds at overnight lows of 25°F, our tester paired the 4.6 R with a 20°F quilt and woke up warm every morning. That is the kind of trip where an R3 pad would have required a closed-cell foam layer to back it up. With the 4.6 R alone, we carried less weight and stayed warmer. The patented dual-vent valve inflates in about 10 breaths and deflates faster than the industry average.

The 20D nylon with TPU construction is a step lighter than the 30D-40D you see at this price, which makes the pack size small but demands more careful site selection. For backpackers who already take care to clear sticks and rocks before laying down their pad, this tradeoff is worth the saved weight. The pump sack that ships with the pad also doubles as a small dry bag.

What the Tradeoffs Look Like

The 20D shell is noisy on movement, the same complaint that follows every high-R inflatable in this category. A small but consistent percentage of long-term users (estimated 5-10%) report internal glue points failing after a year of heavy use, which can cause low spots. We did not encounter this in our test window, but it is worth knowing if you plan to log serious miles on the pad.

For thru-hikers chasing a sub-2 lb pad with tested R4.6+ insulation, the Naturehike 4.6 R is one of the best three-season picks on the market. The 3.15 inches of thickness also keep side sleepers from bottoming out on most surfaces. It does not deliver true R7+ winter, but it is exactly the warmth-to-weight step most three-season backpackers actually need.

8. Sea to Summit Camp Plus SI - Best Self-Inflating Foam Pad for Stomach Sleepers

The Sea to Summit Camp Plus SI is the rare self-inflating pad that makes stomach and back sleepers happy. Foam-based pads sit lower and feel more stable than air pads, which means belly sleepers do not feel like they are rocking on a boat the way they often do on high-loft inflatables. Our stomach sleeper tester called the Camp Plus SI the most comfortable pad she used all year.

The 4.2 R-value is honest and tested under ASTM F3340. For three-season backpacking and car camping where overnight lows rarely drop below freezing, this is the kind of R-value that pays for itself by extending your season into early spring and late fall. The 75D recycled polyester face fabric is also notably tougher than the 20D-30D shells on most inflatables, which matters if you camp on abrasive ground.

The multi-function reversible valve is the real innovation here. It opens for self-inflation (let the foam cores expand, then top off), opens again for one-way inflation for topping up with breaths, and flips for rapid deflation. Sea to Summit's valve engineering is the best we tested in this roundup. It is the small touch that makes this pad feel premium compared to cheaper self-inflating options.

Why Foam Pads Still Earn a Spot

Self-inflating pads are slower to set up than inflatables, no way around it. The Camp Plus SI takes 15-30 minutes to fully self-inflate, so we recommend cracking the valve open when you arrive at camp rather than waiting until bedtime. The 1.5 inch loft is also too thin for side sleepers over 160 lbs who need shoulder and hip pressure relief, which is the main reason this is not an editor's choice pick.

Where the Camp Plus SI wins is durability and stable comfort. It will outlast three or four generations of inflatable pads, and the 75D shell stands up to dogs, kids, and rocky ground without complaint. If you mostly sleep on your stomach or back, want a pad you can leave inflated in a wall tent for a week, and value honest R-value over ultralight weight, the Sea to Summit is a smart long-term buy.

9. Gear Doctors Oxylus 4.3 R-Value - Most Reviewed Budget Self-Inflating Pad

The Gear Doctors Oxylus has the most reviews of any pad in this roundup (4,732 reviews and 4.5 stars), and the crowd is right. It delivers honest R4.3 insulation in a self-inflating foam pad at a price that makes it accessible for first-time four-season campers. Our tester carried it on family camping trips for an entire season without a single failure, and the lifetime replacement guarantee is real. Gear Doctors honors it.

The 4.3 R-value is enough for late fall, early spring, and mild winter nights at sea level. Stack it with a Z Lite Sol (additional R2.0) if you plan to camp in below-freezing temps at elevation, and you have an affordable winter sleep system for under 4 lbs total. The 75D micro-coated polyester shell is also notably tougher than the budget competition.

What sets the Oxylus apart from similar self-inflating pads at this price is the combination of weight and warmth. At 2.2 lbs it is light enough for short backpacking trips, light enough for motorcycle camping, and light enough for a 14er day where you do not want to carry much overnight. The lifetime warranty is also the rare feature in this price tier that holds up, with reviewers reporting replacements shipped within days of contacting support.

What You Give Up for the Price

At 22 inches wide and 72 inches long, the regular size is too short for users over 6 feet and narrow for broad-shouldered sleepers. The shell is thinner than premium pads, so we recommend pairing it with a Tyvek groundsheet under the pad for puncture protection on rocky ground. The stuff sack is also small, and rolling the pad back into the bag is a two-person job once it is fully expanded.

For budget-conscious buyers, first-time four-season campers, and anyone who values a long warranty over premium build, the Gear Doctors Oxylus is the highest-rated choice in this roundup. It is not the lightest or warmest, but it is the most reliable budget pad that delivers what it claims. If you want R4+ warmth for under 50 dollars from a brand that will replace the pad, this is it.

10. Therm-a-Rest NeoAir XLite NXT - Premium Ultralight Pick for Thru-Hikers

The Therm-a-Rest NeoAir XLite NXT is the ultralight pad that defined the category, and the NXT revision fixed the one complaint everyone had about the original XLite: noise. The ThermaCapture reflective heat technology plus the Triangular Core Matrix delivers an honest 4.5 R-value at 13 oz, which is the warmth-to-weight benchmark every other ultralight pad now chases.

At 9 x 5 x 5 inches packed, the XLite NXT fits inside any pack and disappears inside any bikepacking bag. The WingLock valve is the fastest inflate/deflate in this roundup, and the included pump sack means you can set up the pad without ever using your lungs. Reviewers consistently call out the quality of the construction: this is a USA-built pad with a real limited lifetime warranty behind it.

For thru-hikers chasing sub-1 lb sleep systems, the XLite NXT is still the gold standard. We carried it on a 14-day Sierra section and a 9-day Winds loop, and the combination of 13 oz weight and R4.5 warmth made it the lightest pad in our kit by a wide margin. Reviewers report using it on the PCT, AT, CDT, and even shoulder-season winter trips with a stacked foam pad for additive warmth.

Who the XLite NXT Is and Is Not For

The 20 inch width is the most consistent complaint. Restless side sleepers who move across the pad through the night will feel the edge against their hip or shoulder. If that is you, look at the XLite NXT in wide (25 inch) or consider the Naturehike 6.5R with sidewalls. The premium price is also a real barrier for budget buyers, though the warranty makes up some of the cost over years of use.

Where the XLite NXT absolutely wins is on weight, packed size, and warranty-backed durability. For thru-hikers, bikepackers, and fastpackers who want the lightest tested R4.5 pad in production, this is still the pad to beat. Our team has logged 10,000+ miles on various generations of the XLite and the NXT is the quietest, warmest, and most reliable version yet.

How to Choose the Best High R-Value Sleeping Pad

Choosing a high R-value sleeping pad is less about picking the highest R-value you can find and more about matching R-value, weight, thickness, and durability to the coldest nights you actually camp in. The chart below is the rule we use for our own trips: match the pad to your lowest expected overnight temperature, then add headroom for safety.

Match Your R-Value to the Lowest Overnight Temperature You Camp In

Per the ASTM F3340 standard, an R-value is the thermal resistance of your pad measured under the same conditions across every brand. In 2026, this means a Sea to Summit R4.0 truly keeps you as warm as a Therm-a-Rest R4.0. As a rule, summer backpacking wants R1-R3, three-season wants R3-R5, and true winter or snow camping wants R5+. Most sleeping bag temperature ratings also assume you are using a pad of at least R4.0 to actually feel the bag's rated warmth. Below that rating, even an expensive 0°F bag will leave you cold on snow because conductive heat loss bypasses the loft.

Weight vs Warmth: The Real Tradeoff

Higher R-value pads are heavier, but the relationship is not linear. The Hikenture Ultralight R6.2 weighs 1.5 lbs, while the Elegear CumbreX R9.5 weighs 8.1 lbs. That 6x weight gap for 1.5x more R-value tells the story: once you cross R6, every additional R-value costs more grams. For backpacking, R5-R6.5 is the realistic ceiling for keeping weight reasonable. Above R7 in an inflatable typically means 2+ lbs.

Stack pads to push R-value higher without the weight penalty. A 13 oz NeoAir XLite (R4.5) plus a 14 oz Z Lite Sol (R2.0) is 27 oz total and an additive R6.5 sleep system. That is the same warmth as the Hikenture Ultralight, but with a closed-cell foam backup you can sit on at camp. This is the trick most experienced winter backpackers use to balance warmth, redundancy, and weight.

Baffle Construction and Comfort for Side Sleepers

Baffle construction matters more than people realize. Horizontal baffles create a flat surface that is stable for back sleepers but tends to push air toward the center under a hip, the classic pool-toy effect. Vertical baffles and diamond-grid welds (like the Tensor Extreme or XTherm NXT) cradle the body and reduce that instability. For stomach sleepers, low-profile foam pads like the Sea to Summit Camp Plus SI sit more stable than tall inflatables.

Thickness interacts with baffle type. Most ultralight pads sit at 2.5-3 inches, which is enough for back sleepers but borderline for side sleepers above 170 lbs. Pads at 3.5-4 inches give side sleepers real pressure relief at the hip and shoulder. Our team found the Naturehike 6.5R with sidewalls and the TREKOLOGY UL R7 (4 inch) the most side-sleeper-friendly in this roundup.

Denier, Durability, and Puncture Risk

Denier is the thread weight in the outer fabric. Lower denier (15D-20D) is lighter and packs smaller, but is more vulnerable to abrasion and punctures. Higher denier (40D-75D) is heavier, but stands up to dogs, rocky ground, and accidental gear drops. For thru-hikers on established trails, 15D-20D is fine. For winter camping with crampons, dogs, or rough ground, 40D+ pays for itself in longevity.

Most high-R inflatable pads use 20D-30D shells to keep weight down. That is a tradeoff you should know about. Always carry the included repair patches. For pure durability, the Sea to Summit Camp Plus SI (75D) and Gear Doctors Oxylus (75D) lead this roundup. For pure weight, the Naturehike pads at 20D win. For balance, the TREKOLOGY UL R7 at 40D is the sweet spot.

Self-Inflating vs Inflatable vs Closed-Cell Foam

Self-inflating pads combine an open-cell foam core with an air bladder. They are heavier than inflatables but more durable and easier to repair in the field. The Gear Doctors Oxylus and Sea to Summit Camp Plus SI represent this category well. Inflatable pads use only air plus internal insulation (down, synthetic, or reflective film) and are the lightest. Closed-cell foam pads (like the Therm-a-Rest Z Lite Sol) are bombproof but bulky and uncomfortable for sleeping.

For most modern backpackers, an inflatable is the right call. For car camping and family camping, a self-inflating foam pad adds comfort and durability. For alpine climbing and snow camping, an inflatable plus a closed-cell foam backup (additive R-values) is the standard setup. Each has its place, and the best high R-value sleeping pad for you is the one that matches how you actually camp.

Frequently Asked Questions

Final Verdict: The Best High R-Value Sleeping Pad for 2026

If you want the warmest pad money can buy and you camp out of your car or your truck, the Elegear CumbreX R9.5 is our editor's choice. It pairs the highest tested R-value with the comfort of memory foam and a built-in pillow. For ultralight backpackers chasing the highest R-value per ounce, the Hikenture Ultralight R6.2 at 1.5 lbs is the standout performer, and the Naturehike 6.5R with sidewalls is the right call if you are a restless side sleeper. Thru-hikers should still look at the Therm-a-Rest NeoAir XLite NXT for its 13 oz weight and tested R4.5, and budget buyers will not find a better all-around value than the Gear Doctors Oxylus at R4.3 with a lifetime warranty. Pick the R-value that matches your coldest nights, not the highest number you can find, and your sleep system will earn its keep every trip.