Zpacks Duplex Zip Tent Review
Updated:
Mar 02, 2026
Interior Space
Weight & Packed Size
Weather Protection
Durability
Ease of Use
Sustainability
Design Type
Trekking-pole shelter
Packaged weight
1 lb. 3.6 oz.
Floor Area
28.1 sq. ft.
Floor dimensions
90 x 45 in.
Peak height
48 in.
Capacities
1, 2, 3P
Pros
Cons
Zpacks Duplex Zip
Editor's note: In 2025, Zpacks updated the Duplex Zip to the Duplex Pro. The “Pro” has a wider and shorter floor plan (84 x 50 vs. the Zip’s 90 x 45 in.) that accommodates two wide sleeping pads side-by-side, and features double L-shaped doors that open independently and hinge at the sides rather than the base—one of our main gripes about the “Zip” version. The Zpacks Duplex Pro weighs 1 pound 4.1 ounces all-in and retails for $799.
An enormous space-to-weight ratio is one of the Duplex Zip’s greatest attributes. The tent features a symmetrical floor that measures 45 inches wide and 90 inches long (28.1 sq. ft.); compared to most ultralight backpacking tents, I appreciated its length and rectangular (non-tapered) floorplan. Throughout my time on the Continental Divide Trail thru-hike, I always had enough room to change clothing, cook, and even do a little stretching. I mostly slept solo in the Duplex Zip, but the tent’s non-tapered floor makes it great for sharing: You have the option to sleep head-to-toe with your tentmate, and the 45-inch width easily accommodates two standard, 20-inch-wide sleeping pads.
If I have one gripe with the Duplex Zip’s layout, it’s that its usable length feels shorter in practice than its dimensions suggest. The walls slope heavily at the head and foot, which means that while you can easily place a long sleeping pad into the tent, there isn’t much wiggle room to prevent either your face or the bag’s foot box from coming into contact with the tent walls. This can be mitigated by using a stick (or an extra trekking pole) to redirect the sidewall guylines to pull the walls upwards instead of down and out. I did this as often as possible, and it made the tent feel a lot roomier.
This tent is ridiculously light, even when compared with the competition. Weighing 1 pound 3.6 ounces, the Duplex Zip undercuts its two main rivals—the Hyperlite Mountain Gear Unbound 2 and the Durston X-Mid 2 Pro—by 2.4 ounces and 1.4 ounces, respectively. And when you look at freestanding and semi-freestanding shelters, it reigns supreme by a wide margin: The popular freestanding Big Agnes Copper Spur UL2, for example, weighs 3 pounds, while the semi-freestanding Nemo Hornet Osmo 2 checks in at 2 pounds 8 ounces. (Both of those models are naturally easier to set up due to their pole structures, however.) Clearly, the Duplex Zip is an excellent choice for hikers focused on achieving their lowest optimal base weight while maintaining a high amount of livability.
The one thing that prevents this tent from achieving a perfect score in this category is its packability: Dyneema doesn’t compress very well, and despite the Duplex Zip’s minimalist weight, I found that it couldn’t fit horizontally inside my 60-liter Gossamer Gear Mariposa, which is a popular ultralight pack. I also had to practice folding and rolling the tent tight enough to fit it back into the sack. It still takes up less space than a regular freestanding tent, though, and you can divvy up the poles, fly, and body of the tent between you and your hiking partner to make storage easier.
I was initially apprehensive that the Duplex Zip would be unstable in heavy gusts given its tall peak height and non-freestanding design, but it proved me wrong. Throughout my stint on the Continental Divide Trail (and particularly in Wyoming and Colorado), I weathered many windy nights in the tent. The large side walls were the most vulnerable to wind and flapped heavily even when guyed out, and during strong gusts, I could feel my trekking poles flex and sway under the cross load. However, as long as I found solid ground to place my stakes, the Duplex never threatened to collapse. It wouldn’t be my first choice for an environment where high winds and exposed camping are almost guaranteed (an expedition up Mt. Rainier, for example), but it will skillfully withstand most wind you’ll face on most 3-season backpacking trips.
The Duplex Zip’s Dyneema construction is inherently waterproof and doesn’t wet out or sag. The second night I slept in the tent I got hit by a roaring thunderstorm in Glacier National Park, including penny-sized chunks of hail mixed with heavy rain (I was a little worried about the possibility of hail punching straight through the fly given how hard it was hitting). My designated tent site quickly flooded, leaving half-inch puddles directly underneath me. Despite this, I stayed dry in the Duplex Zip, aside from a little bit of rain spray from the hail hitting the puddles. I fared significantly better than most of my fellow hikers, many of whom were using tarps and bivies or thin sil-nylon tents.
To touch on the rain spray I mentioned above: The Duplex Zip features a section of mesh in between the Dyneema bathtub floor and tent wall. When the ground creates the proper conditions for splashing, it’s common for moisture to enter into the tent through this patch of mesh. However, Zpacks intelligently added cinches at both the head and foot ends, which you can tighten to close the gap between the bathtub floor and the tent wall. Once I learned to use this feature, I tightened it up every night it threatened to rain, and it went a long way to mitigate splashes entering the tent.
Dyneema boasts one of the best strength-to-weight ratios around, and the Duplex Zip can handle rougher treatment than tents that derive their ultralight weight from thin nylon or polyester. While its auxiliary features such as thin mesh, guylines, and line locks prioritize weight savings over durability, this tent surpassed even my lofty expectations of what a Dyneema-based shelter can do. After over four months of use and almost 3,000 trail miles, my tent’s only breakdowns were a minor snag on the stake loop of a guyline and a small pinhole in the bathtub floor—but these were both easy fixes. Even after the rigors of the CDT, the zippered doors on the bug netting and the vestibules never failed, and the seams and stitching on the rain fly look almost new.
But while the Duplex Zip holds up well to use, it’s worth noting that the tent has a rather “handmade” feel compared to the premium Hyperlite Unbound 2 and standard freestanding and semi-freestanding backpacking tents from big-name manufacturers like Big Agnes or Nemo. On my tent, there were loose threads and uneven stitching, and a general sloppiness in design when compared to the Unbound. While those factors don’t ruin the performance of the tent by any means, I’d expect a bit more from a shelter that costs well north of $700.
I tested a version that features a 0.55 ounce-per-square-yard (oz./sqyd) DCF canopy, but it’s also worth noting that Zpacks offers the Duplex Zip with a 0.75 oz./sqyd DCF canopy, which weighs 1.8 ounces more and is even more durable. Both versions have thicker 1.0 oz./sqyd DCF floors. For comparison's sake, the Hyperlite Unbound 2 features a 0.55 oz./sqyd canopy and 1.0 oz./sqyd floor.
The Duplex Zip’s setup process is easy to learn but difficult to master. The initial process is simple: Start by staking out two corners on one long side of the tent, making sure that there’s a slight bit of slack between them. Insert a trekking pole on the opposite side and create tension with the first apex guy line; then, insert the second pole on the initial staked side to tension the main ridgeline of the tent. Stake out the opposite corners, tension the vestibules, and re-stake as needed to get an even pitch. You can then adjust the extra guylines, or redirect the head and toe guidelines with a stick (as mentioned in the Interior Space section) to maximize head or foot space. While this process is more complicated than that required for freestanding and semi-freestanding tents (and requires secure anchors), it’s not as complicated as trekking-pole shelters’ reputation would have you believe.
My biggest frustration is that a perfect pitch isn’t very repeatable. You have to guestimate all the angles during setup, which usually means re-staking a couple of points and straightening your poles unless you were lucky enough to get everything right on the first try. The Duplex Zip thankfully goes up pretty quickly when the weather is bad (and unlike a double-wall shelter, the tent’s inside will never be exposed to the elements in the setup process), but something will likely be uneven or oddly tensioned. Shelters such as the Splitwing tarp from Slingfin are trickier to set up initially, but once I had it down I felt like I could nail a perfect pitch every time. The few times I’ve used the Durston X-Mid, the process felt a little bit easier to master as well.
Features-wise, I had a mixed experience with the Duplex Zip. On the plus side, I loved the magnetic door toggles, which I could operate one-handed to roll back the storm doors. However, I found the door tighteners far from intuitive and almost impossible to get right. Additionally, the rainbow-shaped mesh doors (which attach along the base) require two hands to zip and unzip, and pile messily onto the tent’s floor (I prefer a door that hinges from the side, like that of the Hyperlite Unbound).
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Like most single-wall shelters, the Duplex Zip is not particularly impressive when it comes to ventilation. That said, there are a couple of features to help mitigate condensation buildup or at least keep it from dripping on you. First off, pop open the two peak vents. These are unique to the Duplex Zip; unlike the standard Duplex—which relies on small gaps on its storm doors to ventilate—the Zip’s vents are a completely separate feature. With an ideal pitch, they’re decently sized, but I wasn’t always able to get a pitch that kept them fully open. In fair weather, you can also pitch the tent a little higher by adjusting your trekking poles and letting more airflow come in under the fly. And hands down the best way to combat condensation with the Duplex is to keep one or two doors open, which is possible even in light rain.
When condensation does eventually build up, the Duplex Zip is designed to prevent it from collecting in the tent. The bathtub isn’t directly sewn to the fly but is instead separated by a bug mesh skirt; when moisture beads up, in theory, it should roll down the fly and fall through the mesh. During sustained rainstorms, however, I found that condensation droplets could get knocked off of the fly by the rain and wind and fall directly onto me and my gear. I was never at risk of getting soaked in this way, but things could certainly start to get damp after a full night of condensation drips.
Interior Storage
The Duplex Zip has one small side pocket sewn into the bathtub floor below each door. I typically used these pockets to store my headlamp and phone, plus any other small items I wanted close at hand. The dearth of storage space is unfortunate but par for the course for most trekking-pole tents. If you’re flying solo though, there’s plenty of floor space for organizing gear.
Vestibules
The vestibules on the Duplex Zip are nicely sized and stack up well with other ultralight backpacking tents. They measure the length of the tent (90 in.) by about 24 inches. You can easily stash a backpacking pack and hiking shoes in each one, and they’re large enough to cook and make coffee in during inclement weather.
Hyperlite Unbound 2 ($775): Higher-Quality Carbon Copy
The Unbound weighs a couple of ounces more than the Duplex Zip, but that’s about the only advantage the latter has over the former. The Unbound is easier to set up, is 3 inches wider throughout, and has a more polished construction overall. We particularly found its door guylines and hardware to be much easier to use than that of the Duplex Zip. The Unbound does lack the cinches at the head and toe that close the gap between the fly and bathtub floor to mitigate splashes, which is one of our favorite features of the Duplex Zip. And unlike the Zpacks, it’s not available in a model with .75 oz./sqyd DCF. But the lower cost and higher build quality are enough to persuade us, although true ounce-counters will want to stick with the Duplex Zip. For more, read our review of the Hyperlite Unbound 2.
Durston X-Mid 2 ($319): An Intriguing Budget Option
The Durston X-Mid 2 has a lot to offer for less than half the price of the Zpacks Duplex Zip. The X-Mid is a trekking pole shelter, but it bucks the A-frame trend with a unique double-wall parallelogram design. This has a number of benefits: The pitch only requires four stakes (vs. the Zpacks’ six), the trekking pole is located beside the door rather than in front of it, its ventilation is far superior to a standard single-wall design, and the headroom is centered over the head rather than in the middle of the tent (provided you sleep head-to-toe with your tentmate). At 2 pounds 2 ounces, the X-Mid 2 weighs quite a bit more than the Duplex Zip, but it’s a well-built tent that’s still significantly lighter than most standard backpacking tents. And for what it’s worth, Durston also makes the Dyneema X-Mid 2 Pro ($789; 1 lb. 5 oz.), which bests the Zpacks in most categories.
Even among its ultralight brethren, the Duplex Pro stands out. What’s perhaps even more impressive than its rock-bottom weight, though, is that it doesn’t sacrifice much durability or weather resistance to achieve it. However, this tent’s setup process can be tricky, and we felt that its build quality didn’t quite match that of other top contenders.
Interior Space
Weight & Packed Size
Weather Protection
Durability
Ease of Use
Sustainability
The Unbound 2 is a thru-hiker-approved trekking-pole shelter. It boasts a more straightforward setup than other tents in its class, and its Dyneema construction results in plenty of space and waterproofing at a very low weight. It’s a bit bulky when packed and definitely isn’t cheap.
Interior Space
Weight & Packed Size
Weather Protection
Durability
Ease of Use
Sustainability
If you’re in the market for a high-value trekking pole shelter, look no further. The Durston X-Mid offers a premium, innovative design that’s a step up in convenience from models like the Zpacks Duplex and Hyperlite Unbound—if you can handle the weight penalty.
Interior Space
Weight & Packed Size
Weather Protection
Durability
Ease of Use
Sustainability
Is the Duplex Zip for You?
The Zpacks Duplex Zip is one of the lightest (if not the lightest) fully enclosed trekking pole tents on the market. The glory of this design is that it’s just as lightweight as many floorless shelters, but still maintains the space, durability, and weather protection of many freestanding and semi-freestanding backpacking tents. The trekking pole design does have its tradeoffs: It requires solid anchors to pitch (above-treeline travelers, beware), has less internal storage than modern ultralight tents, and headroom is compromised due to the A-frame construction. The Zpacks also has more of a homemade feel compared to competitors from Durston and Hyperlite, but the brand cachet might be a point of pride for many thru-hikers. If you’re a serious ounce counter and can overlook the tent’s insanely high price tag though, it’ll go a long way in helping you achieve a low base weight.
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