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Slingfin Portal 2P Tent Review

The SlingFin Portal is a highly-livable and lightweight two-person tent with a spacious dome-shaped design that’s ideal for three-season use. But what sets the Portal apart from other tents is the ability to extend it for use in more extreme four-season winter conditions, including snow loads and high, buffeting winds, with virtually no added weight. At 2 lbs 13 oz, that makes the Portal suitable for year-round, 4-season use, a capability that most lightweight three-season tents can’t match.

Slingfin Portal Tent

Ease of Setup
Weather Resistance
Packed Size

Strong but Lightweight

The Slingfin Portal is a lightweight two-person tent that can be used year-round in extreme weather. It has a unique internal guyline system which adds wind-resistance without additional weight.

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Specs at a Glance

  • People: 2
  • Type: Semi-freestanding, requires a minimum of two stakes to set up
  • Shape: Dome
  • Internal pockets: 7
  • Seam sealed: yes
  • Weight: 2 lbs 13 oz
  • Dimensions:
    • Floor: 85″ x 51″ (head) x 42″ (foot)
    • Peak height: 44″
  • Materials
    • Floor: 20D Nylon Ripstop PE 1800mm
    • Fly: 10D Nylon 66 Ripstop Sil/Sil
    • Inner: 15D Nylon no-see-um mesh
  • For complete specs visit the SlingFin Portal product page

Inner Tent

The Portal’s inner tent is all mesh which is good for three-season use because it helps optimize airflow and condensation mitigation in warmer weather. The pole architecture is very simple, with long crossing poles connected to a central hub and a cross pole that helps create near-vertical side walls and doors. There are two doors so each occupant has their own side entrance, a must-have in my book for any two-person, dome-style tent. The doors are D-shaped making them easy to enter and exit.

Each door comes with two bi-directional zippers, so if you break one, you have a second pre-installed for use. Zippers are one of those things that do fail eventually on tents, so this is a nice feature to ensure a long lifetime of use.

The inner tent is all mesh and suspended from two crossed poles linked by a central hub

A cross pole lays over the central pole hub, creating awnings that extend beyond the doors when the fly is deployed. This makes it possible to keep the vestibule doors open when it is raining, which is a super nice feature to help reduce internal condensation inside the tent.

The cross pole helps create vertical doors and creates an awning over the doors to prevent rain from entering the tent when the fly is deployed.

The Portal is a quite livable tent, in addition to being a strong one. The interior wide is large enough to fit two 25″ wide tapered inflatable sleeping pads side by side pad and there are seven large internal mesh pockets so you can get your gear off the floor to create more interior room. This includes two pockets in the ceiling, two along the sides of the tent at the head and foot ends, and a tent-wide pocket over your feet. These pockets are great for storing glasses, cell phones, headlamps, wet shoes and socks, and other essential items.

Internal Guylines

When erected, the inner tent is quite strong. This “inner strength” is the hallmark of SlingFin’s lightweight tents, which incorporate a unique internal guyline system used to dampen the buffeting that leads to pole collapse in high winds. Since the internal guyline system weighs virtually nothing, there’s no weight overhead to it, which is rather ingenious. If you only camp in protected campsites, you won’t need it, but it’s ideal for camping in more exposed alpine zones and on winter ski tours.  Here’s a video below, that explains how to deploy the internal guyline system, and one that explains how it was developed and tested on Mt Washington(home of the world’s worst weather), which is only a few miles from the area where I field-tested the Portal.

Trekking/Ski Pole Adapters

In addition to the internal guylines, you can augment the strength of the Portal’s ceiling cross-pole, particularly when snow loading is a concern. There are velcro “outrigger” straps at the ends of the cross pole that you can wrap around your trekking or ski pole handles or over your snow baskets to reinforce the inner tent ceiling. Again, there’s virtually no added weight required to use this capability.

You can use your trekking or ski poles to strengthen the inner tent.

Rain Fly

The Portal’s rainfly attaches to the same corner grommets as the inner tent reducing the number of tent stakes you need to set it up in good weather. While the inner tent is technically freestanding, you really do need to carry at least 2 stakes if you want to stake out the side vestibules. I’d still recommend staking out the corners, but you don’t have to in a pinch.

The side vestibules can be propped open without having to be rolled back

The Portal’s side vestibules can be used in a wide variety for ways for gear storage and ventilation. The vestibule doors have dual, bi-directional zippers, so you can zip down the top zipper to create a transom effect or unzip them down the middle to roll back both doors or just one side at a time. There are also velcro patches sewn along the zipper sides, so you can unzip the door and prop it open with orange Kickstands (orange-covered fiberglass rods) to maintain more privacy without sacrificing airflow. The kickstands, are easy to lose though, so you’ll want to keep close track of them.

It’s also worth noting that the Portal has a 2-sided silicone impregnated flysheet instead of a PU coating for better durability. That process, which is also used by Hilleberg, results in a stronger and more waterproof rain fly. It’s just another indicator that SlingFin designed this tent for long term use, which shows in the materials, redundancies, and features that they incorporated to make it.

Comparable Two-person, Lightweight Tents

Make / ModelDoorsWeightPrice
Big Agnes Copper Spur HV UL 222 lbs 12 oz$450
Big Agnes Fly Creek HV UL 211 lb 15 oz$350
Zpacks.com Duplex21 lb 3 oz$599
REI Quarter Dome 223 lbs 5 oz$349
MSR Hubba Hubba NX223 lbs 8 oz$450
Copper Spur HV UL 112 lbs 2 oz$380
Six Moon Designs Lunar Solo11 lb 10 oz$200
REI Half Dome 2 Plus24 lbs 14 oz$299
NEMO Hornet 2P21 lb 14 oz$370
Tarptent Double Rainbox22 lbs 10 oz$299
The SlingFin Portal is a comfortable and strong tent for all of your backcountry adventures


The SlingFin Portal is a lightweight and well ventilated 2 person tent which weighs 2 lbs 13 oz (45 oz). While it isn’t the lightest weight, two-person tent you can buy, the Portal is certainly one of the strongest and most durable, making it an excellent option if you like to push the envelope in terms of terrain or seasons. The Portal’s internal guyline architecture makes it much more resilient in the face of high winds, while its trekking/ski pole outrigger capability significantly expands its range of use in the colder months. If you’re the type of person who’s willing to carry a little extra weight in exchange for gear you can count on through thick and thin, then the SlingFin Portal Tent is going to be right up your alley.

Disclosure: SlingFin loaned the author a tent for this review.

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  1. Fly sits too high off of the ground to consider it for 4 season use for me.

    Id much rather ustilize a tent where the fly hits the ground. This alleviates issues such as drafts, spin drifts, so on and so forth.

    Don’t care about the chimney effect when its in true single digits and the condensation from ur breath is freezing to the inner of ur tent fly anyways

    I’ve looked at a few of the Slingfin tents and am honestly not impressed.

    I would buy a Hille or a Warmlite for 4 season use.

    When one item serves multiple purposes it really never excels at 1…

    • I considered that too. You can pitch the fly closer to the door in order to minimize the gap between the ground and the bottom of the vestibule door to reduce winter drafts, but a higher solid/breathable panel around the inner tent would mitigate that more. You could also simply build a short snow-wall around it too. But while I think this tent can get you into more wintry conditions, it’s not a substitute for a full four-season capable Hilleberg. But I recently tried a Warmlite and was appalled by the low-quality sewing. I have friends who swear by them, but I’m not a fan.

      • I am surprised a company hasnt done a true all season tent with a removable snow skirt that attaches to the fly.

        Would give the tent more flexibility and they could go opposite of Hille and offer 4 season inserts which deep 6s some mesh for fabric inner side panels.

        Last temt I saw that was dubbed a 3.5 season tent was the REI Arete.

      • I don’t think there’s a huge amount of demand for it. Who’s crazy enough to backpack year-round except you or me? There are really very few of us.

  2. Question: do the angled handles of Pacerpoles work with those tent connections?

  3. Great review, Philip! Do you plan to assign a star rating? How would you compare this tent against current DCF 2P tents? Thanks!

    • I’ll assign a star rating soon. It’s a very nice tent and I really enjoyed using it, but it really a very different animal compared to the current generation of DCF trekking pole tents. It would be like comparing a land rover to a miata. Different users and priorities.

      • Fair point. Perhaps you could compare this tent against, say, Tarptent’s nylon tents, particularly in terms of weather resistance and durability? Thanks again!

      • Is there any particular Tarptent you want me to compare it since they make about a dozen, some with and without tent poles?

      • Sure. How would you match it against the Bowfin, Notch, and StratoSpire? Thanks again!

  4. How fast and easy is it to set up in the rain without getting the inside wet?

    • With all dome tents like this, bring a small microfiber towel. You’ll need it to wipe up the floor when you take off your rain gear inside the tent anyway, and for washing up, of course.

  5. The Bowfin is the most comparable Tarptent because it requires that you carry an additional tentpole. The one person Bowfin has two vestibules (as do the notch and stratospire 1) so you don’t need to carry a heavier 2 person tent to get the same benefit. Silnylon tarptents have a higher hydostratic head (waterproofing) rated at 3000mm than the portals 1800 mm. All of the Tarptents you mentioned are quite wind and weather worthy, even with snow loads, but are more susceptible to wind buffeting and load flapping because silnylon stretches and they don’t have a continuous pole structure backing them like the Portal. The portal has much better internal pockets, including gear loft pockets than all of these Tarptents, making it a much better interior experience when shared by 2 people. All of these tarptents can also be set up fly first in rain to prevent the inner tent from becomming wet although you need to prepare the tent in advance to detact the inner from the outer beforehand. The portal is easier to set up on rock ledge or snow because it is freestanding if you don’t stake out the vestibules (the pitchlock ends of these tarptentsmust all be staked out). It is also somewhat less drafty because the fly is cut lower on the sides. Hope that helps!

  6. I like the looks of this tent but in your opinion is it $150 better than the Slingfin 2Lite?

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