What did the therapist say to the two shelters who came in for couples counseling???
Relax! You're two tents!
Now that everyone's in the spirit, let's talk shop. Sea to Summit's new lineup of lightweight backpacking tents made waves last year for backpackers everywhere. The Telos TR2 and Alto TR2 tents share many overlapping features while still presenting some key differences that keep backcountry folks debating around the fire (and in the YouTube comments section). For this rundown, I recruited Dan Becker, who has implemented the Alto TR2 tent for most of the last year. Since I am a proud owner of the Telos TR2 tent, we can both speak to the specs and from personal experiences in the wild.
ROUND 1 – THE SEA TO SUMMIT TELOS TR2 TENT
Details:
Price: $559 (USD)
Capacity: 2 Person
Design Type: Freestanding
Season Rating: 3 Season
Dimensions: 84.5 x 53 x 43 in.
Height: 43.5 in.
Floor Area: 28 sq ft.
Packed Weight: 3 lbs 10 oz.
The Sea to Summit Telos TR2 Tent Review | Eric's Breakdown
The first thing worth pointing out is the high-tension ridge, which created some high-tensions in the comment section of my stand-alone review. I think it's a great design because it makes the walls of the Telos much more vertical, which expands the headroom throughout. A common concern that people had in regards to this feature was that the vertical stature might make it vulnerable to heavy wind.
I got to test this out firsthand while holed up in my Telos through a night of 20-30mph winds, with gusts upwards of 45-50mph. Despite the considerable force, the tent didn't budge, nor was its structure compromised. The walls naturally gave a bit, pushing inwards against my body, but nothing beyond what I would've expected in those conditions. Though winds can still blow much harder than that, I didn't actually have my guy lines set up on that night, so those would combat the gusts even more if necessary. After my experiences, I'm not personally concerned about the integrity of the Telos tent.
Telos TR2 Tent Top Ventilation
Another hot-button issue online was in regards to the top ventilation point. The idea is that the heat and condensation wants to escape from the apex of the tent, and therefore a zippered window was put in at the ridge to act as a chimney. Some people worried that water would leak in through this vent from the outside. I can confidently vouch for this not being an issue. If you take the time to set up your Telos, with all the proper tension and angles, then this should not present a problem. I appreciate the apex ventilation because it really does reduce the trapped condensation that tends to bead all over the ceiling of many tents.
Storage Space for the Telos TR2 Tent
Storage space is another strong selling point of the Telos. There are two corner pouches and mesh envelope sides that are great for stowing phones, keys, books, and all the loose gear that needs a home at the end of the day. The Telos is a good choice for people who like to be organized.
Potential nifty tent feature?
A potentially nifty feature (in theory) is the Lightbar. The sleeve that the tent poles come in is actually designed to double as an overhead light fixture. It has a piece of white plastic that lines the sleeve and reflects the light of a head lamp, which can be inserted after the tent is set up. The problem with my Telos was that both the Lightbar and the ceiling had female clips, and so there was no way to attach this dual-function accessory. This could be an early-issue defect, but I would recommend scouting this out before purchase.
Telos TR2 Size and Dimensions
Here's a little note on dimensions for those looking to utilize the 2-person designation. Because of the 10-inch taper towards the foot of the tent, sleeping pads must be strategically selected in order to share the space. I use a 25-inch-wide sleeping pad for my solo adventures, which could not be doubled up in this tent. That being said, I'm in love with the headroom in my Telos.
A critique of mine comes in regard to the anchor clip for the tent door flap. In my opinion, it's positioned too low, which makes the door sag in an annoying way when resting open.
The Telos did see a marked price jump recently, but I still think that it's a worthwhile purchase for experienced backpackers looking for a luxurious shelter.
ROUND 2 – THE SEA TO SUMMIT ALTOS TR2 TENT
Details:
Price: $499 (USD)
Capacity: 2 Person
Design Type: Semi-Freestanding
Season Rating: 3 Season
Floor Dimensions: 84.5 x 53 x 38 in.
Height: 42.5 in.
Floor Area: 27 sq. ft.
Packed Weight: 2 lbs 15 oz.
The Sea to Summit Altos TR2 Tent Review | Dan's Breakdown
Since the Alto TR2 is a semi-freestanding tent, it does require 2 stakes to properly set up. The pole structure of the Telos makes this an optional step. Interesting to note, the head of the Alto requires staking, which is counter to many other semi-freestanding tents that I'm familiar with. I believe this helps contribute to the weight savings. This is an obvious advantage from a spec comparison as the Alto is about 11-ounces lighter than the Telos. Sneaking in under 3-pounds is a nice barrier to beat.
In terms of the door flap, the Alto seems to anchor much cleaner. There was no extra slack to manage. It rolled up like a tight backcountry doobie.
Altos TR2 Headroom
Similar to the Telos, the headroom in the Alto stands out. One of my true measures of a two-person tent is if the occupants can sit comfortably, maybe playing cards while waiting out a storm, and not just have to lie down, packed like sardines. The headroom holds well as you transition from the head of the tent to the foot. This owes to the creative, upward-bow design of the Tension Ridge (same design as the Telos).
Nifty tent feature confirmed
The Lightbar did attach in the Alto (as it certainly should have in the Telos), which highlighted the utility of this feature.
Altos TR2 Tent Top Ventilation
In terms of ventilation, I've used the Alto in a range of conditions (i.e. warm, freezing, deep snow) and in all cases there was zero condensation inside the tent. This has been mind-boggling for me, so definitely props to the Sea to Summit ventilation system in these tents.
Packing the Altos TR2 Tent
In terms of storage, there are also attachments for the stuff sack bags, which can then double as junk-drawer-like compartments, and the envelope pockets are still present. Plus, it provides loads of interior hooks to hang stuff from. The weight savings do not come at the expense of storage.
A notable trade-off for the Alto is the extra tapering of the tent floor. This will limit the sleeping pad options even more if 2 people are camping for the night. Prospective Alto owners might want to look at tapered sleeping pads to boot.
Who are the Sea to Summit Alto and Telos Tents for?
Overall, the Alto TR2 offers almost the exact same features as the Telos TR2, with the main points of differentiation being the structure design and the extra taper of the footprint. These alterations contribute to the weight savings, which can be the deciding factor for some hikers. If you don't mind the trade-offs, or if you're on a tighter budget, this might be your winner.
The main argument for the Telos is that it's more suitable for rocky terrain or any other conditions in which it's difficult to get stakes in the ground. The freestanding design allows for more flexibility and less fortification of the tent's base. The vertical structure definitely also boosts the overall comfort for the shared camping experience.
No matter what the final decision, both the Telos and the Alto tents are luxurious options that have garnered Sea to Summit a lot of well-earned attention. Because of the price points and extra finesse required for setup, these tents would be better suited to passionate backpackers, rather than budding vagabonds. If you pass this basic sniff-test then there are some minor comparisons to weigh (literally), but both versions will provide a premium, reliable, feature-rich, lightweight shelter option.
I hope you enjoyed this article. For more information, check out all my gear reviews and tips on BackpackingTV.
