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Hilleberg Nammatj 2 Review

One of the more versatile tents we have ever tested, this model is comfortable and lightweight
hilleberg nammatj 2 4 season tent review
The Nammatj 3 pitches from the outside with two poles. The tent has 30 sq. ft. of interior space and 13 sq. ft. of vestibule space.
Credit: Hilleberg
Price:  $875 List
Manufacturer:   Hilleberg
By Ian Nicholson ⋅ Review Editor  ⋅  Oct 31, 2019

#15 of 17
  • Weight - 27% 5.0
  • Weather/Storm Resistance - 25% 7.0
  • Livability - 18% 8.0
  • Ease of Set-up - 10% 6.0
  • Durability - 10% 7.0
  • Versatility - 10% 7.0

Our Verdict

The Hilleberg Nammatj 2 is one of the more versatile tents available. It's strong enough to cross polar regions and scale tall peaks, yet it is also light enough (6.5 pounds) to join you on summer backpacking trips and comfortable enough to live out of for extended periods in campgrounds. This model is excellent for everything from car camping and backpacking to mountaineering and polar expeditions. It's just okay for alpine climbing in the summer, only because pitching locations could be limited. If we were to have one two-person tent for everything, the Nammatj would certainly be in the running.
Good in high winds
Lightweight for a double wall tent
Extremely durable
Three color options
Not as strong as dome tents (not as good for base camping)
Only two pockets
Can be more challenging to pitch in rockier terrain

Compare to Similar Products

hilleberg nammatj 2 4 season tent review
Awards  Editors' Choice Award Editors' Choice Award Top Pick Award Best Buy Award 
Price $875 List$900 List$599.89 at Backcountry
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$800 List
$800.00 at REI
$449 List
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Pros Good in high winds, comfortable, lightweight for a double wall tent, versatile, extremely durable, three color optionsBomber, great durability, compact footprint, lighter than average weight, fantastic balance of strength, weight, and livability, ample guy pointsVersatile, lightweight, double wall design works far better in rain than single wall models, handles condensation well, big vestibules, easy to pitchIncluded removable hooped vestibule, above average breathability among single wall tents, excellent ventilation, good headroom, compressible, robustLightweight for a double wall tent, inexpensive, versatile, easy set-up, interior fabric handles condensation well, and longer-than-average dimensions make this a better option for taller people
Cons Not as strong as dome tents (not as good for base camping), only two pockets, can be more challenging to pitch in rockier terrainPoor ventilation, slightly tricky setup, insufficient guy lines includedIsn't as strong as other 4-season models, offers a good but not excellent packed sizeGuylines are light duty, not quite as storm worthy as other models, fabric is less resistant to tearing and long term exposure to UVTiny vestibule, one of the weakest 3(.5)-pole designs in our review, only one door
Bottom Line One of the more versatile tents we have ever tested, this model is comfortable and lightweightAll-around uses are this model's forte, but it's still robust enough for when the weather turns gnarThe ski and summer mountaineering focused design perfect for almost any trip you can dream upA versatile single wall tent that works well for a greater range of conditions than most other 2-pole bivy-tent modelsA solid 4-season shelter at an excellent price. Great for summertime mountaineering or winter camping near treeline
Rating Categories Hilleberg Nammatj 2 Black Diamond Eldorado MSR Access 2 The North Face Assa... REI Arete ASL 2
Weight (27%)
Weather/Storm Resistance (25%)
Livability (18%)
Ease of Set-up (10%)
Durability (10%)
Versatility (10%)
Specs Hilleberg Nammatj 2 Black Diamond Eldorado MSR Access 2 The North Face Assa... REI Arete ASL 2
Minimum Weight (only tent, fly & poles) 6.61 lbs 4.5 lbs 3.80 lbs 3.5 lbs (no vestibule) 5.75 lbs
Floor Dimensions 87" x 52 in 87" x 51 in 84 x 50 in 82 48 in 88 x 57/60/44 in
Peak Height 38 in 43 in 42 in 42 in 43 in
Measured Weight, with tent, stakes, guylines, pole bag 6.06 lbs 4.9 lbs 4.1 lbs 5.44 lbs 6.25 lbs
Type Double Wall Tunnel Single Wall Double Wall Single Wall Double Wall
Packed Size 6" x 20 in 7" x 19 in 18 x 6 in 7 x 22 in 6 x 6 x 20 in
Floor Area 30 sq ft 31 sq ft 29 sq ft 27.3 sq ft 32.9 sq ft
Vestibule Area 13 sq ft 9 sq ft (optional) 17.5 sq ft 10 sq ft 8.7 sq ft
Number of Doors 1 1 2 1 1
Number of Poles 2 2 2 4 4
Pole Diameter 10.2 mm 8 mm 9.3 mm 9.3 mm
Number of Pockets Side: 2 Ceiling: 0 Side: 4 Ceiling: 0 Side: 2 Ceiling: 0 Side: 2 Ceiling: 0 Side: 2 Ceiling: 2
Pole Material DAC Featherlite NSL Green Easton Aluminum 7075-E9 Easton Syclone DAC Featherlite NSL Aluminum
Rainfly Fabric Kerlon 1800 3 layer ToddTex 20D nylon ripstop FUTERLIGHT Nylon ripstop
Floor Fabric 100D PU coated nylon Unknown 30D nylon ripstop 40D ripstop nylon w/3,000mm PUR/silicone coating Nylon taffeta

Our Analysis and Test Results

The Hilleberg Nammatj 2 is incredibly versatile. It's sturdy enough for most expeditions but light enough to take on 3-season mountaineering and backpacking trips. The tunnel-shaped design offers a relatively spacious interior and is strong enough for winter camping; however, it can be challenging to set up if you're not pitching your tent on snow or in an established campground, which is pretty common for summer-time mountaineering in the lower-48 and Southern Canada.

Performance Comparison

There are four different versions/sizes of this tent. We tested the Nammatj 2.

Ease of Setup

All Hilleberg double-wall tents pitch from the outside first; their inner tent suspends from the pole structure and outer tent. This design is faster to set up than most double-wall tents that pitch the inner tent first. It also helps to keep the internal tent drier. The Nammatj has two poles that insert into reinforced sleeves. Slide them in, secure each with an adjustable strap, then stake the front into the wind, then the rear, then the other tie-outs. After a bit of practice, one person can have the tent pitched in less than two minutes.

hilleberg nammatj 2 4 season tent review - the foot end of the nammatj 2. this tent pitches from the outside...
The foot end of the Nammatj 2. This tent pitches from the outside and the whole set up was quick and easy.
Credit: intersk898

In calm conditions, it's possible to pitch the tent with only the four corner points, which is extremely quick. The pole sleeves and quick-adjust guylines make the Nammatj dramatically faster to set up than two-person dome tents such as The North Face Mountain 25. However, it's not as easy to pitch in rocky terrain, slabs, or locations where self-supporting or freestanding dome tents are faster and easier because its challenging to get anchors in the ground.

hilleberg nammatj 2 4 season tent review - nammatj 2 with half of the inner tent taken down from the outer fly.
Nammatj 2 with half of the inner tent taken down from the outer fly.
Credit: intersk898


Tunnel tents offer the ultimate blend of comfort and strength while maintaining a reasonable weight. The Nammatj has steep walls and a spacious interior; it is more comfortable than dome tents that have low angle walls. For example, the Nammatj is much more comfortable than the Jannu, which has only a small area in which to sit up. The critical difference here is the Nammatj's flat roof and relatively steep side walls, which dramatically increase interior volume and make the tent less claustrophobic.

hilleberg nammatj 2 4 season tent review - the interior is roomy thanks to the higher walls compared to a dome...
The interior is roomy thanks to the higher walls compared to a dome tent.
Credit: intersk898

The Nammatj's vestibule is more spacious than others due to the higher ceiling. Although the vestibule floor area is the same as the Hilleberg Jannu, the Nammatj vestibule has more volume, making it much better for gear storage and cooking. Ventilation is another crucial factor that influences comfort. Here, too, the Nammatj does very well. Both ends of the tent have a massive vent that ties out with three self-equalizing guylines. Each vent can be opened fully or closed with either mesh bug netting or a solid nylon fabric. These options allow you to adjust the airflow according to what's going on outside.

For example, you can close the windward end (Hilleberg recommends that this be the front of the tent) and leave the leeward vent open. The rear of the inner tent also has a vent that can be opened fully (to reach out and adjust the outside vent) or closed with either bug netting or a solid nylon fabric. Overall, the Nammatj has superb ventilation. It is dramatically better than the vast majority of the tents we tested, and virtually every other contender from other brands.

In part thanks to the ventilation, cooking in the Nammatj's vestibule is more pleasant and likely safer than in many other lightweight two-person tents, as the vent is right above the stove. You can exhaust carbon monoxide even in foul weather without opening the door. Bonus: moisture vapor from cooking also escapes, thereby reducing condensation.

hilleberg nammatj 2 4 season tent review - the nammatj's four ground level guy points and the self-equalizing...
The Nammatj's four ground level guy points and the self-equalizing vent guyline make this product capable of withstanding severe winds. The vents can be opened fully, closed with mesh netting, or closed with solid nylon.
Credit: Max Neale

Although our testers found the Nammatj to be highly comfortable, it's not a palace like huge dome tents or larger tunnel tents (like Hilleberg's Keron). The Nammatj only has one pocket on each side wall, unlike dome tents for base camping that may have eight or more pockets. This reinforces the fact that the Nammatj is a mobile tent that aims to balance weight, strength, and comfort rather than provide all the comforts of home (and weigh so much a porter or yak must carry the tent).

hilleberg nammatj 2 4 season tent review - lots of space for sitting up and stretching inside the nammatj 3...
Lots of space for sitting up and stretching inside the Nammatj 3 (which is 4" taller than the Nammatj 2). Note the clothesline for hanging things.
Credit: Brad Miller

Weather Resistance

The Nammatj uses 10.2 mm DAC Featherlite NSL Green poles, which are some of the better aluminum poles found in any mountaineering tent. If you think the world might end, you can add another set of poles, sold separately, to the tent — just insert them into the oversized pole sleeves. But, we've never done this with any of the Hilleberg tents we've tested and would only recommend it for extended base camping.

The Nammatj's low-profile, aerodynamic design slices through wind like a hot knife cuts into butter. Our testers used the tent on Mt. Rainer, Denali, while base camping in the Mohave desert (where there are often high winds and blowing sand), and for scores of trips across the United States and Canada. Tunnel tents are usually the best choice for polar expeditions where high winds whip unrestricted across miles of ice and snow. Felicity Aston, a UK-based explorer, chose the Nammatj for her epic 59-day solo journey across Antarctica; she became the first woman to ski across that continent alone.

The Nammatj's fabric is a durable silicone coated nylon that breaks at 40 pounds! That's up to five times stronger than many backpacking tent fabrics and roughly twice as strong as the average fabric in the winter tents we've tested. Result: if the material gets punctured, it is less likely to tear. All Hilleberg 4 season tents have walls and vestibules that extend all the way to the ground. This is not the case with many other winter tents from other brands.

The extended length serves to reduce spindrift and splashback, and the tent is much more weather resistant as a result. The only fly setup we've tested that is more weather resistant is on the SlingFin HardShell, a four-person expedition basecamp tent with a snow skirt that can be extended out from the tent or clipped tight underneath.

Although the Nammatj excels for the vast majority of winter conditions, it does have two limitations that could be potential drawbacks for some people.

(1) The tunnel design is not as resistant to snow loading as dome tents that have a web of intersecting poles. Our testers reach for tunnel tents for the vast majority of winter trips because they balance weight, strength, and comfort well. However, for extended winter base camping or alpine climbing, dome tents perform better. In fact, dome tents are often mandatory if you plan to leave it unattended for a while in foul weather (such as in an alpine/glacial basecamp). Then, the static strength of a dome makes the tent more likely to stay intact while you launch off on a multi-day summit bid and aren't near it to remove snow from it or check on the tie outs.

(2) Alpine climbing demands a tent that is as light and compact as possible. The Nammatj is too big, too heavy, and its tunnel design would be a nightmare to pitch on a small ledge. We find that tiny tents perform best when you need to chop a tent platform with an ice axe or perch on a ledge.

Although these potential drawbacks can be significant, we feel they do not exceed the benefits of low weight, comfort, and versatility. Our Nammatj models have proven themselves on a host of North American mountaineering classics. If you are looking to move beyond Rainer and the West Buttress of Denali to technical, harder high altitude climbs, you'll likely want a double-wall dome tent (like the Hilleberg Jannu) or a superlight freestanding single-wall tent.

hilleberg nammatj 2 4 season tent review - although the nammatj does not have the ultimate static strength...
Although the Nammatj does not have the ultimate static strength, like dome tents do, we find that it performs very well in demanding conditions such as here on Denali.
Credit: Brad Miller


Hilleberg has been building tunnel tents for more than 40 years. The Nammatj is part of their "Black Label" line, which hosts their toughest tents. All of the tent's materials and features are super burly. The top-tier silnylon is both very resistant to tearing and also highly resistant to hydrolysis (the chemical breakup of the coating). Hilleberg tents use top-tier materials and a construction technique that eliminates the need for seam sealing, thereby saving weight. The combination of the poles and fabrics makes for a bomber setup.

Many other small features also contribute to durability. For example, a flat piece of webbing lies across the vestibule opening and serves to keep the vestibule in the proper shape, reducing tension from the zipper. The ends of the pole sleeves are reinforced with a durable material, and, unlike on most other tents, the ground level adjustments are made of metal, not plastic. Hilleberg even adds small metal rings to the ground level tie outs, so vibrations from high winds don't wear out the webbing loops, which are already very tough.

Just how durable is the Nammatj? That's hard to estimate. Despite extensive use for more than two years, our models have not experienced any significant problems. (Someone stepped on the side wall with crampons once, but that was a quick patch with nylon repair tape). We've heard from mountaineering guide services and NOLS instructors that the first point to break on the Nammatj (and Keron) is usually the seam above the center toggle that connects the outer and inner tents. Supposedly, the stitching fails there before anywhere else, but we did not find this in our testing.

hilleberg nammatj 2 4 season tent review - the nammatj 2 at automated geophysical observatory 1, antarctica...
The Nammatj 2 at Automated Geophysical Observatory 1, Antarctica. This product is popular among scientists and support personnel in field camps throughout Antarctica.
Credit: Tressa Gibbard


All Hilleberg tents have removable inner tents suspended from the outer tent. You can pitch the outer tent by itself to save weight any time of the year, which is a critical feature missing on many winter tents from other companies. We like to use just the outer tent for summer backpacking trips and shorter winter trips where saving weight is a top priority. Because the Nammatj's walls and vestibule extend all the way to the ground, the tent is remarkably effective at resisting flying insects. We find that separate bug protection is rarely needed.

hilleberg nammatj 2 4 season tent review - inside the hilleberg nammatj 2 without the inner tent. going...
Inside the Hilleberg Nammatj 2 without the inner tent. Going floorless saves 30.9 oz. for three-season backpacking or fast and light winter travel. The walls seal fairly well with the ground and even minimizes the number of flying insects from entering. Setting up with only the fly and poles is possible with nearly all Hilleberg designs.
Credit: Max Neale

Big mountain guide services use outer tents of the extended vestibule versions of the Nammatj and its larger sibling, the Keron, for cook and group tents. Why? They dig deep into the snow so clients can sit down on benches. This is a much lighter alternative to colossal dome-shaped group tents and is a widely used technique on many high altitude peaks across the globe. Although the shelter does not have a huge vestibule, you can do the same with the Nammatj 2.

hilleberg nammatj 2 4 season tent review - the nammatj 2 is a palace for six kids. shown without the inner tent.
The Nammatj 2 is a palace for six kids. Shown without the inner tent.
Credit: Tara Beck

Weight/Packed Size

The above praise for the tent's livability, weather resistance, durability, and adaptability become much more impressive when you consider that the tent weighs only 6.5 pounds!

The Nammatj 2's inner tent, outer tent, poles, and guylines weigh only 5 pounds 7 ounces.

Each component weighs:
Inner tent: 30.9 oz.
Outer tent with guylines: 41.4 oz.
2 Poles: 15.1 oz.
Pole stuff sack + extra pole section: 2.0 oz.
18 stakes + stake sack: 8.9 oz.

Stuff sack: 3.1 oz.

The Nammatj is extremely light when compared to other double-wall winter tents.

Reducing Weight

You can reduce the weight of the Nammatj several ways. Our favorite way is by using the outer tent, which will give you a savings of 30.9 ounces. This is an excellent option for fast and light travel in any season or to use it as a group hangout shelter (just clip the inner tent back in when you want to sleep).

The next way to reduce weight is by upgrading your stakes. The Nammatj comes with 18 DAC Y stakes, which are moderate quality, heavy all-purpose stakes. We also recommend considering 12 Ruta Locura 9" Carbon Stakes, which will save you

5.5 ounces. They also provide more holding power than the stock stakes and are more durable than the stock stakes. Our tests show that the stock Y stakes bend relatively easily, especially in the compact, rocky soil typically found in alpine camps. Pointy tubular stakes like those from Ruta Locura or 8" Hyperlite Mountain Gear ultralight stakes offer the best performance for use in bare ground. In winter, we like to use ice axes, snow pickets, skis, crampons, snowshoes, poles, and other things for stakes. Dedicated snow stakes, such as the Hilleberg Snow and Sand Peg, are essential if you run out of other things to use as stakes or are base camping.


Unless you are base camping for months at on sharp volcanic rocks, we feel there is no need for a footprint for the Nammatj or any other tent. The majority of the winter tents tested use 70 denier fabrics for the floor. These are much more durable than backpacking tent floors, most of which use 15 to 30 denier fabrics. The Nammatj goes above and beyond by using a 100 denier fabric!

If you want a footprint for base camping and car camping, consider cutting your own from Tyvek Home Wrap, available at hardware stores. Tyvek is likely more puncture resistant and much cheaper than Hilleberg's optional footprint, which also covers the vestibule floor — a feature that we do not find useful on a tent with one vestibule. The weight of the tent and your sleeping bag hold Tyvek in place.

Three Color Options

The tent is available in three colors: red, green, or sand. We've used all three colors; for winter use, we prefer red, which is easier to spot if you need a rescue (via people, helicopters, or planes). We like green for primarily three-season use and bike tours (it's stealthy and harder to be seen), and sand for desert dwellers or military applications.


This is a phenomenal value for a tent that can do just about everything. Seriously, while maybe not a screaming deal in the traditional sense, this tent offers incredible value for its versatile, strength, and durability.


The Hilleberg Nammatj is versatile. We recommend it to anyone that wants comfort and high performance in horrendous conditions - with respectable weight. However, its tunnel design requires that you be inside or near the tent to remove snow from it, and it's too large to fit on tiny bivy ledges, nestled between boulders, or camped our on rocky moraines. With that said, the Nammatj is a top choice for nearly every winter activity except alpine climbing and extended basecamps in exposed terrain.

hilleberg nammatj 2 4 season tent review - the nammatj 3 gt has 30 sq ft of vestibule space!! note the large...
The Nammatj 3 GT has 30 sq ft of vestibule space!! Note the large door. The vestibule extends from the middle pole to the right pole. Sleep with your feet to the left. Location: Joshua Tree National Park, California.
Credit: Diana Wendt

Ian Nicholson
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