Durston X-Mid 2 vs Zpacks Duplex

These two shelters have become the default end of the ultralight tent argument, and the way they are usually framed — cottage against cottage, 890 g against 505 g — hides the fact that they are not the same kind of product. The X-Mid 2 is a conventional tent built unusually well and priced unusually low for the category. The Duplex is a Dyneema tarp with a sewn-in floor, and almost everything people love or hate about it comes from that one decision.

Both are premium by this site's standards: the X-Mid 2 sits in the $300–$400 MSRP band and the Duplex in the $700+ MSRP band. If your budget is the point rather than the last few hundred grams, skip to the cheaper shelter near the bottom — there is one that lands within 12 g of the X-Mid 2 for a fraction of either price.

Side by side

What 385 grams is actually worth

385 g (13.6 oz) is not nothing. It is most of a liter of water, or a down quilt's worth of difference between a 9 lb and a 10 lb base weight. If you are already at a sub-10-pound kit and the shelter is your heaviest remaining item, it is the single biggest cut still available to you — that is a real argument, and it is the argument the Duplex is built for. Our sub-10-pound gear list shows where the rest of those grams come from.

What makes it a weak argument for most people is the order of operations. If your pack is a 2 kg framed model and your bag is a synthetic 20°F mummy, buying a Dyneema tent to save 385 g is paying the highest price per gram available anywhere in backpacking while ignoring two cheaper kilograms sitting in the same pack. Work out where you actually are first with what base weight means, and how to lower your base weight ranks the cuts by cost per gram.

The other two places those grams usually hide are the pack and the sleep system, and both have a cheaper answer than a Dyneema tent: how to choose a backpacking backpack matches the frame to your real load, and Vesper 20 vs EE Revelation 20 covers the quilt end of the same decision.

Double wall against single wall

This is the difference that shows up every morning, and it has nothing to do with price.

The X-Mid 2 is a double-wall tent: an outer fly pitched fly-first, with a separate inner tent hanging inside it. Condensation forms on the inside of the fly, where it does not touch you or your quilt, and you can pitch the fly alone in the rain and clip the inner in dry. Durston lists the complete tent at 890 g (1 lb 15.4 oz) for both parts together (Durston Gear).

The Duplex is a single wall: the Dyneema canopy is both the roof and the room. Nothing separates you from the surface condensation forms on, so in a still, humid camp you manage it with ventilation and by keeping your quilt off the walls. Zpacks offsets some of that with four overlapping storm doors it describes as having no zippers that could fail, and a 24 in vestibule depth per side (Zpacks).

Dyneema also does not absorb water, which means a wet Duplex weighs much closer to a dry one than a wet nylon tent does. In practice that claws back part of the condensation penalty: you may wipe the walls down, but you are not carrying a kilogram of damp fabric. The whole trade is laid out in single-wall vs double-wall tents.

Dyneema against coated polyester

Both makers have solved the problem that ruins cheap trekking-pole tents — neither one asks you to seal your own seams, and neither fly turns into a slack bag at 3 a.m. They solved it differently, and the honest summary is that Dyneema wins on weight and on wet-weight, and loses on abrasion and packing.

Dyneema is a laminate, not a woven fabric with a coating. It does not stretch, it does not soak, and it holds a taut pitch indefinitely. It also creases rather than folds, which is why Zpacks specifies rolling it: the packed size it lists is 4.75 x 12 in rolled tight, against a 7 x 13 in stuff sack. Repeated hard folds, gritty ground and scuffing against rock are what age it. Polyester at 15D is not tough either, but it is cheaper to replace and more tolerant of being stuffed. The fabric families are compared properly in silnylon vs silpoly vs Dyneema, and the price side of the question in why ultralight tents are so expensive.

Floor, doors and living space

On paper this is the X-Mid 2's clearest win, and it is bigger than the numbers suggest.

• Floor width. 52 in (132 cm) against 45 in (114 cm). Two 25 in wide pads fit side by side in the X-Mid with room to spare; in the Duplex they overlap.
• Floor area. 33.2 sq ft against 28.1 sq ft, with both tents at the same 48 in (122 cm) peak height.
• Vestibules. 11.5 sq ft per side on the X-Mid 2, against 24 in of vestibule depth per side on the Duplex. The X-Mid's doors are offset so the trekking poles do not stand in the doorway, which is Durston's signature design choice.

If two adults will share the shelter regularly, the X-Mid 2 is the one to buy and the floor width is the reason. The Duplex is a genuinely comfortable solo palace and a workable two-person tent for people who do not mind touching. For how either fits against the rest of the two-person field, see the best 2-person backpacking tents.

Pitching, stakes and what is in the box

Both tents need two trekking poles; the Duplex specifies 48 in (122 cm) poles or tent poles sold separately. After that they diverge in a way that matters on your first night.

The X-Mid 2 pitches with four stakes, lists no mandatory guylines, and includes 8 DAC J stakes. The Duplex requires six to eight stakes, and Zpacks does not include them — so budget for a set of real stakes with it. Ours are ranked in the best ultralight tent stakes, and that purchase is not optional on a shelter whose entire structure is tension.

One practical note in the Duplex's favor: the zipperless storm doors remove the single most common mechanical failure on any tent. One practical note against it: a four-stake rectangular pitch like the X-Mid's is easier to get taut on uneven ground than a six-to-eight-stake one.

Value: the grams-per-dollar result

Our value metric divides grams saved by list price, so it punishes the Duplex hard: it saves the most grams of any two-person tent on this site and charges the most for them. The X-Mid 2 scores Value 4.5/10 and the Duplex Value 2.7/10, and the X-Mid 2 finishes ahead of it overall — the table above carries both scores.

That is the right ranking for the buyer this site is written for, and it is worth being clear about what it does not say. It does not say the Duplex is a bad tent. It says that if you are deciding how to spend a fixed amount of money to carry less weight, the Duplex is the least efficient place to spend it — and the X-Mid 2 is not far behind it, because both are premium shelters.

The cheaper shelter that is close to both

The 3F UL Gear Lanshan 2 Pro weighs 902 g (1 lb 15.8 oz), which is within 12 g (0.4 oz) of the X-Mid 2, and lists at about 60% of its price (3F UL Gear). It saves 998 g (2 lb 3.2 oz) vs the Kelty Late Start 2P and takes the best value score of the three at Value 7.5/10.

The catches are real and you should take them seriously. It is a single-wall silnylon shelter with a fly rated 2,000 mm — well under the X-Mid's 3,500 mm — and 3F states the seams are not factory sealed and that you must seal them yourself before use, with no sealant supplied. That is an evening of work with a tube of silicone, and if you will not do it, buy something else.

If you would rather have a double wall at a budget price, the plain Lanshan 2 is the answer: 1,060 g (2 lb 5.4 oz), double wall, two doors, a 5,000 mm fly and factory-taped seams (3F UL Gear). It is 170 g (6.0 oz) heavier than the X-Mid 2 for roughly half the price, and Lanshan 2 vs Durston X-Mid 2 is the page that runs that comparison properly.

Who should buy which

One more honest note on buying either of the premium two: both are sold direct, the X-Mid 2 by Durston Gear and the Duplex by Zpacks, and neither had a live Amazon listing when we checked. That means no buy button here, no commission to us, and shipping and returns on the maker's terms. Trekking-pole shelters as a category are ranked in the best trekking pole tents; if you would rather not hold your tent up with your poles at all, see the best freestanding backpacking tents.

What we cannot tell you

We do not pitch these tents, so we cannot tell you how either one handles a 40 mph gust on an exposed col, or how many seasons a 0.55 oz/sqyd canopy lasts under your particular habits. Dyneema's long-term durability is the single most argued-about question in ultralight gear and the honest answer is that it depends enormously on how you pack and where you pitch.

What we can do is be precise about the published figures — 890 g against 505 g, 52 in against 45 in, 3,500 mm coated polyester against 0.55 oz/sqyd laminate, four stakes against six to eight — and both makers publish unusually complete spec tables. Every number on this page traces to one of them in the Sources list, and both shelters were confirmed available to order on their makers' own stores on 2026-10-30.