Alto TR1 Plus - One Person Ultralight Tent (3+ Season)
BEST USE: Ultralight Backpacking
PERFORMANCE: 3 Season
PACKED WEIGHT: 2 lbs 7 oz | 1110 g
PACKED SIZE: 4 x 18 inches | 10 x 46 cm
- Tension Ridge raises the tent’s shape upwards for more usable head-and-shoulder space and creates truly higher doors for easier entry and more vestibule storage.
- Color-coded ultra-strong lightweight DAC NSL poleset and quick connect pole feet make for easy setup.
- Made for longevity and superior waterproof performance by using premium materials including DAC poles, YKK zippers, 7-series aluminum hardware and seam-taped PeU-coated rainfly.
Alto one and two-person is a semi-freestanding tent perfect for weight-conscious backpackers who still want a high degree of livability in their shelter.
The revolutionary Tension Ridge architecture of the Alto allows for taller oversized doors and vertical walls that create an unrivalled amount of space. Apex Vents positioned at the highest point of the tent effectively expel moist air and minimize condensation, and the variable rainfly can be rolled back on both sides for stargazing, then deployed quickly from inside the tent.
‘Alto’ is the Italian word for ‘high’. One night will prove that the Alto is a level above other ultralight tents

DESCRIPTION
The Alto TR 1 Plus semi-freestanding tent provides maximum livability for the solo backpacker who is active right to the ends of shoulder seasons.
Vertical walls, a tall, oversized door and the same functional details as the standard Alto combine with materials that will keep you warm and dry in windier and wetter conditions. Whenever you camp, you’ll have more usable space, better ventilation and more versatility than any other ultra-lightweight tent – because ‘going solo’ shouldn’t feel like ‘solitary confinement’.
Features
- Made for 3+ Seasons with a fabric inner tent which keeps out cold drafts. Plus a higher-specification waterproof floor, suitable for the wetter ground conditions.
- Tension Ridge raises the tent’s shape upwards for more usable head-and-shoulder space and creates a truly higher doors for easier entry and more vestibule storage.
- Color-coded ultra-strong lightweight DAC NSL poleset and quick connect pole feet make for easy setup.
- Made for longevity and to be waterproof by using premium materials including DAC poles, YKK zippers, 7-series aluminum hardware and seam-taped PeU-coated rainfly.
- FairShare storage system: tent packs into 3 stuff sacks to split the load. After set-up, stuff sacks transform into gear storage pockets.
- Lightbar: add a headlamp and secure the tent pole storage sack to the apex of the tent for soft even illumination.
- Rainfly can be setup first for a dry setup and takedown.
- Includes 9 Ground Control Light Tent Pegs.
- 4 detachable guylines which can be quickly attached to loops on each tent corner.
- To extend the life of your tent floor we recommend using a Sea to Summit footprint - sold separately.
Construction & Materials
- The 6” deep 20D nylon tub floor is rated to 2500mm hydrostatic head – ideal for wet and boggy conditions.
- Lightweight 20D ripstop nylon inner tent fabric keeps out drafts and spindrift.
- Silicone / Polyether Polyurethane-coated 15D nylon rainfly fabric provides long-lasting waterproof performance.
- The poles of the Tension Ridge™ are swept upwards – not angled downwards as is common in tents. This raises the tent’s shape, providing significantly more livable space.
- Apex Vent - at the highest point of the tent, this oversized vent efficiently expels warm air to prevent condensation and can be easily zipped shut from inside the tent.
- Baseline Vents allow you to control airflow and effectively manage humidity and condensation in wet conditions without letting the rain in.
- Quick Connect Foot is a beautifully designed, machined aluminum clip that attaches the pole and the inner foot with ease and is stronger than plastic buckles that can break.
Year-Round Versatility
Versatility that is head and shoulders above other shoulder-season tents
Engineered for end-of-season weather…
- Dry setup and takedown (put up the rainfly first / take it down last to keep the inner tent dry)
- Quick Connect Foot System (attach the pole and the inner tent easily, even while wearing gloves)
- Fabric inner tent (prevents cold drafts from robbing you of warmth inside the tent)
- Uprated floor (waterproof performance for wet, boggy conditions)
Perfect for warmer-weather use, too…
- Roll back the rainfly all the way to the Tension Ridge for stargazing, or redeploy the rainfly from inside the tent if the weather changes.
TECH SPECS
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Design TypeSemi Freestanding
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Door Count1 Door / 1 Pole
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Fabric - Canopy20-denier ripstop nylon
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Fabric - Floor20-denier ripstop nylon
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Fabric - Rain Fly15-denier ripstop nylon
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Pole MaterialDAC Featherlite NFL 8.7mm and NSL 9.0mm
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Season Rating3+ Season
| Alto TR1 Plus - One Person Ultralight Tent (3+ Season) | |
|---|---|
| Floor Area | 19.5 sq. ft.19.5 sq. ft. |
| Floor Dimensions | 84.5 x 42 x 24 in.84.5 x 42 x 24 in. |
| Fly + Footprint Pitch Weight | 1lb 11.3oz.1lb 11.3oz. |
| Minimum Trail Weight | 2 lbs. 5 oz.2 lbs. 5 oz. |
| Packed Size | 4 x 18 in4 x 18 in |
| Packed Weight | 2 lbs 11 oz2 lbs 11 oz |
| Peak Height | 42.5 in.42.5 in. |
| Pole Diameter | 8.7 and 9.5mm8.7 and 9.5mm |
| Vestibule Area | 7.5 sq. ft.7.5 sq. ft. |
TECHNICAL FEATURES
TENSION RIDGE
The poles of the Tension Ridge are swept upwards like the dihedral wing of an airplane – not angled downwards as is common in tents. This raises the tent’s shape, providing significantly more head and shoulder room, higher doors, easier access and more usable vestibule space.
QUICK-CONNECT POLE FEET
Typical of Sea to Summit’s commitment to refining details to make gear frictionless and more functional, these machined aluminum clips make setting up the rainfly (either with the inner tent, or with a footprint in ultralight configuration) quick and easy. And they are far more durable than plastic buckles.
FAIR-SHARE STORAGE / LIGHTBAR
Every Sea to Summit tent packs up into three stuff sacks to allow you to split the load easily. During setup, two stuff sacks transform into gear storage pockets, while the pole stuff sack (with a translucent diffuser) becomes a Lightbar. Add a headlamp or two for soft illumination throughout the tent.
APEX VENT / BASELINE VENT
Mounted at the highest point, Apex Vents allow warm moist air to escape and channel fresh air into the tent. The vent can easily be zipped shut from inside the tent and does not require mesh to retain its shape, significantly improving airflow. Baseline Vent allows you to control humidity in wet conditions by opening or closing lower portion of the door while maintaining vestibule function and rain protection for your gear.
Frequently Asked questions
Do I need to use a footprint with this tent?
The Alto has a very light floor, waterproof to 1200mm. It can be used on wet grass/undergrowth without a footprint. However, a footprint will protect the floor from damage on abrasive surfaces.
What does 'semi-freestanding' mean?
The Alto tents have a lighter poleset than the Telos, but need to have the corners staked out at the head end.
What are the differences between regular and 'plus' models?
The Alto Plus has a nylon fabric inner (with unzippable vents) rather than mesh to prevent cold air getting into the inner tent. It also has a more waterproof floor (2500mm against 1200mm).
Will a 200 x 64 cm pad fit in this tent?
You can just squeeze a large rectangular pad into the Alto TR 1 (it was primarily designed for ultralight backpackers who generally use smaller pads).
Worth the weight difference over a bivy shelter?
We think so. The Alto gives you room to sit up, excellent ventilation (so almost no condensation) and a vestibule to store wet gear - all of which you won't have in a bivy shelter.
Shipping & Returns
Free Express shipping via Australia Post within Australia for orders over $99.*
All orders under $99 incur a $10.00 shipping fee for delivery within Australia.
*Does not include bulky items. Orders with bulky items incur an additional freight charge within Australia during the checkout process.
For more details, check out our Shipping Policy.
We do not ship to an address outside of Australia.
If you are not entirely satisfied with your order, you may be entitled to a refund of the purchase price of the Product. For more details, please check out our Refund Policy.