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[Payment-free review without consideration] Everything is for comfort and ease of use. A lightweight tent filled with innovative and practical ideas SEA TO SUMMIT Alto TR1 Plus Tent

Sea to Summit is an Australian outdoor brand that comes from the unique feat achieved by its founder, "traveling through the mountains of Mt. Bay of Bengal and Mount Everest without oxygen."

As their ingenious challenges show, the products they create are always studded with unique and clever ideas, yet functional and full of practicality in the real field. Their products they make have started with inner sheets for sleeping bags, and are not satisfied with developing stuff sacks and cookwear, and have finally continued to grow to work on big names such as sleeping bags, mats, hammocks and shelters.

After over three years of research and development, they have finally launched a full-scale double-wall tent this season. As an outdoor fan who regularly touches on their commitment, there's no way I can't be shaken up!

The latest tents are two series that are optimized for different purposes, with the common innovative technology and concepts. The first is ALTO TELOS, which is highly versatile and highly livable .

This time I bought both of them myself immediately after they were released and was able to try them out for a while, so I will start by reviewing the Alto TR1 Plus tent (hereinafter referred to as Alto)

SEA TO SUMMIT Alto TR1 Tent Main Features

Recommended points

Interesting points

Main Specifications and ratings

Item name Sea to Summit Alto TR1 Plus Tent
Number of people to sleep 1 person
Weight (actual measurement)

Total weight: 1,190g

  • Inner Tent + Stuff Sack: 411g
  • Fry + Stuff Sack: 360g
  • Paul + Stuff Sack: 316g
  • Pegs, repair poles, gailines + stuff sack: 103g
Inner Tent Material 15D PeU RipStop Sill Nylon (Water Resistant: 2,500mm)
Fry material 15D PeU RipStop Sill Nylon (Water Resistant: 1,200mm)
Pole material Aluminum DAC TH72M
External dimensions 109 x 169 x 223cm
Floor height 100cm
Floor area 1.81㎡
Front room area 0.7㎡
Storage size 11 x 11 x 44cm
accessories
  • Stuffsack (main body, fly pole, peg)
  • Ceiling light bar
  • Pegs x 9
  • Repair pole
  • Guyline x 4
evaluation
Living comfort ★★★★★
Ease of setup and removal ★★★★☆
Weather Resistant ★★★★☆
Durability ★★★☆☆ *If you lay out a separate footprint★★★★☆
weight ★★★★☆
Portability ★★★★☆
Versatility ★★★★★

Sea to Summit Alto TR1 Plus Tent Detailed Review

"Let's rethink the design of the tent" -- a new tent shape created in collaboration with giants in the tent world.

First of all, I would like to mention this tent: the unfamiliar signature on a piece of fly sheet (photo below).

The person mentioned there is Jake Lar, one of the key figures who created this tent, a skilled tent designer, and founder of DAC, a tent pole maker who leads the modern tent industry.

I have never heard of writing the name of a designer on a mass product outdoor tool. Of course, this is not just a desire to stand out, but rather a sign of confidence, responsibility, and most importantly, enthusiasm as a creator. In short, it definitely means "I'm in high spirits."

In this way, Alto (&Teros) was carried out through the collaboration of two founders and designers who both Sea to Summit and DAC, who have "creativity" and "craftsmanship," and who are leading the outdoor gear industry.

They first started by "finding a thorough investigation into what people are struggling with about their tents," according to one magazine. All the problems that emerged in this situation were reexamined from scratch, and instead of being bound by the preconceived notion that "this is a tent," they formed the ideal tent from scratch, "what is an ideal tent that solves the problems faced by tents today?"

The Alto was born after three years, at first glance, and at first glance it looks very similar to other tents, but when you look closely, when you actually use it, it is an undoubtedly innovative and highly complete tent that is stunning with its slight slits and spurts into its fine comfort and ease of use. Let's take a closer look.

A "modular storage system" that is easy to store and pack easily

Previous tent storage was the simplest thing to pack everything into one bag, and a bit more kind to store the inner and fly, poles and pegs in separate bags.

Meanwhile, the Alto is packed with inner tent, rainfly, pole pegs and all parts divided into separate stuff sacks (photo above). This will allow one person to share their luggage with their companions rather than carrying them all (although it is not much benefit for one person).

And this isn't the end. These four storage units can be carried neatly together using the "modular storage system" (photo below). The tent itself cannot be folded that small, but the flexibility of packing minimizes stress.

I took the contents out and lined up the accessories (photo below). In addition to the inner tent, fly pole, and pole, there are nine pegs, four guylines, and repair poles, and plenty of necessary equipment. Incidentally, all the tent fabric, pole and peg materials are made from high-quality materials, both in weight and durability.

Tension Ridge pole system that allows you to experience the spaciousness that you wouldn't expect from a single person tent

The pole structure is semi-free-standing, one side is forked, each one fixes the end of the tent, and the other one fixes the center of one side (both ends are peg-fixed).

A completely freestanding tent with poles secured at the four corners is stable, but it requires more poles, which increases the weight. On the other hand, while completely non-free-standing tents have less poles and are lighter in weight, there are concerns about the need for setup space and the wind resistance. In that sense, semi-free-standing, which uses both poles and pegs to a certain extent, is a good option for achieving a balanced balance of lightness, durability, and ease of construction.

However, the problem here is that semi-independent type reduces the living space (especially the space above). When this type of pole structure was first first, I had no choice but to give up because this low comfort in residential comfort is a trade-off for lightness.

A major solution to this problem is the newly implemented pole structure called tension ridge

A tension ridge is the Y-shaped top pole part just at the vertex of a tent. Certainly, some people may have seen poles that cross the top of a tent in light tents from other manufacturers. However, if you look closely, the tension ridges clearly point upwards at both ends of the pole (photo below).

the upward tension ridge to secure the side wall part (photo below).

The side walls then rose almost vertically, and the cramped feeling I had felt up until now was as little as a lie. As an image, as shown in the dotted line in the photo below, we can see that the top space has been narrower up until now, the tension ridge has greatly expanded the area around the head.

"By reversed the pole (facing upwards), we achieved best-in-class interior space and ventilation without adding weight or bulk to the tent," Lar said in another media, but a slight difference, this Y-shaped upward tip pulls up the tent's sidewalls more vertically than the others, making the head space so spacious that you might think it's a tent for two people. The ceiling is also high, making the upper space spacious and comfortable. The doors at the entrances and exits located on the long side have also become taller and larger, greatly improving the sensibility that is common with lightweight single-person tents (photo below).

As a small ingenuity to support the spacious space, the top of the head bottom has a core material inside, making it even more vertical to ensure that the walls rise up (photo below).

Naturally, the feet are lifted high, so there is no sense of pressure (photo below).

The bottom is asymmetrical and has a small bulge at the back, making it possible to use it as a space to place luggage such as a backpack next to the bed (photo below).

The vestibule is not particularly spacious, but the tension ridge provides enough room to easily place your backpack, so you won't feel any stress (photo below).

For reference, we have posted photos of the inner tent being installed from all directions.

Below is an all-way photograph of the fly over it. When you cover the fly, it becomes a dome-shaped shape that is almost symmetrical to the front and back, and there is less concern that the vertically raised sidewalls will be affected by the wind, and there is less difference in influence depending on the wind direction.

"Tension Ridge" Another breakthrough. Achieve more efficient ventilation than ever before

Alto (&Teros) has two patterns of inner tents: mesh (TR1) and non-mesh (TR1 plus), which makes this a lineup that is also friendly to countries that like Japan who like non-mesh (of course I chose the non-mesh one too).

Generally, non-mesh ultra-lightweight tents tend to be undermined due to the problem of light weight reduction. However, this issue has also been improved beautifully in this Alto. Of course, the key player is Tension Ridge .

The tension ridge pole lifts up at both ends, allowing you to place a ventilation hole just above the top of the tent (photo below).

To coincide, mesh opening and closing ventilation is placed on both sides of the inner tent and on the ceiling (photo below).

This ventilation is provided at the top, which is ideal for warm air and water vapor to escape, resulting in more effective air flow than ever before. It suppresses heat buildup and condensation inside the room. To be honest, this is the first time I've ever had a tent that has such a good runoff (non-mesh) thing. I'm sure I'll hear people who have been holding back from ultra-lightweight tent users who have been holding back until now, saying, "This is this!"

Furthermore, the "baseline vent" function has been designed to create maximum airflow even when the fly is still over it (photo below). The bathtub is also set to a relatively high height, so there is no need to worry about rain coming in as it is.

It is said that setting up the upwind side at your feet when the humidity is high (gray arrow) and the upwind side at your head when the temperature is high (orange arrow) can maximize airflow.

Of course, it is also possible to fully open the fly tent entrance as usual to maximize breathability. The ceiling can be opened and closed high, so it also gives it a good sense of openness (photo below).

Various setup modes that allow you to stay comfortable at all times, regardless of the environment, location, or scene

Not only are there a variety of environments, including strong winds, heavy rain, extreme heat, humid and cold, but in today's world, it is often used in different situations with various purposes, from long-term traverses to light hiking, bikepacking and camping, the needs of tents are becoming more and more diverse. This tent can be set up in a variety of modes for such selfish enthusiasts, and is designed to make it comfortable and easy to use in a wide range of situations.

First, the most basic pattern is a fly sheet over the inner tent (photo below). Despite the lightweight tent, footage from the test facility showed that it would not even sway even under strong winds of over a dozen meters.

Fly + inner mode

Of course, in seasons where there is little rain, you can remove the fly and use it with just the inner tent. If this is a mesh-type inner tent, you can sleep while gazing at the starry sky. In this case, even minor adjustments are possible, such as simply rolling up the fly, covering the fly partially (photo below).

Half fly mode

Inner only mode

Furthermore, it can be set up with just the fly (photo below). This is perfect for summer picnics to prevent strong sunlight and wind (photo below). From here, it is also possible to set up the inner tent inside, which is also an effective safety option, such as setting up the tent first to prevent the rain. However, what caught my eye when I actually built it was that without the footprint sold separately, the pole would extend slightly horizontally, and it couldn't be built very well, which is a bit disappointing.

Fly only mode

There are many ideas that are not yet finished, and are thought out down to the smallest detail that can only be made in this tent.

In addition to the innovative constructions discussed so far, this tent is also scattered with easy-to-use, comfortable, and easy-to-use features that will make you grin.

The photo below shows the clip on which the fly sheet is attached. The simple construction of highly durable aluminum makes it lightweight, non-breakable, and easy to put on and take off (photo below).

The length is also easier to adjust (photo below).

The pegs are made from high-quality 7000-square aluminum alloy, which is also used in aircraft, and have a deformed Y-shaped design, making them lightweight and strong. There are multiple notches for hanging ropes, so even if it is a shallow hammer on the ground that is difficult to drive pegs, it can be fixed close to the ground (photo below).

Personally, what I find great about this tent is that it is all the staff sacks after setup are mobilized to improve comfort. The stuff sack that houses the tent and fly can be attached to the corner of the room and used as an accessory holder (photo below). Honestly, I thought I was "defeated" by this. This careful and careful attention to detail was a Japanese skill that could be enjoyed by even a single grain of rice.

Of course, regular mesh pockets are also standard equipment inside the room, so there is no inconvenience if the ceiling storage is not available due to ventilation (photo below).

What's even more, personally my favorite part is this "light bar" (photo below). At first glance, it is an ordinary tent pole storage bag, but it has a white semi-transparent plate inside, allowing it to be hung from the ceiling inside the tent.

I put the headlamp inside it and turned on the light horizontally, which is strange. It can be used as a lantern that lights up the inside of the tent like a fluorescent light (photo below). This is also a shrewd thing that uses a handy part without wasting a single piece. No, no, it's scary, and it's amazing.

Summary: From fast packing to trekking, traverse, river climbing, bike packing... Not a poor person, but a reliable place to accommodate any activity

I've reviewed it for quite some time, but in fact, this tent still has many features and charms that cannot be talked about. After three years of research and development, the tent finally released has been a surprise. That's how this tent is innovative, wonderful, and has a strong, detailed adaptability that is designed to suit all modern outdoor activities in general.

However, if there is still something I would like to want, it is the ease of setup. Anyone who is used to it can somehow build it well, but for beginners, it can be both a hassle or difficult to "attach a Velcro fastener to secure the fly to the pole" or "stretch an asymmetrical shaped tent neatly without wrinkles." Personally, I love tents with integrated inner and fly tents that can be set up all at once, so if that can be achieved there is nothing I can say.

Alto , a particularly lightweight tent with a tension ridge, is a new option that allows hikers who prefer light and fast styles first and foremost, to get the ultimate comfort without sacrificing their light weight, and will appeal to them at a great strike. Furthermore, the Alto is attractive for its exquisite balance of weight, comfort and weather resistance, and not only can it be used in ultra lights, but it will also be satisfactory for normal climbing, trekking, stream climbing, bikepacking, etc. However, if you are using it in a hard way, don't forget to protect the bottom with a footprint.

Of course, it is not impossible to use it for camping, but for such light outdoor leisure activities, another tent released at the same time, Telos fits better. Please wait for further reviews on this.

created by Rinker
SEA TO SUMMIT
¥63,360 (As of 08:46:14, 2025, 05/13, 2025, Amazon research - Details)

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