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Designed for weight-conscious solo backpackers who still want a high degree of livability, the Sea to Summit Alto TR 1 tent has nearly vertical walls and a minimum trail weight of only 2 lbs. 1 oz.

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  • Unique Tension Ridge™ architecture with an inverted brow pole allows for extensive interior living space, increased ventilation and a higher door
  • The oversize Apex Vent™—positioned at the highest point of the tent—efficiently expels warm air to prevent condensation and can be zipped closed from inside the tent
  • Adjustable vents at the base of the tent allow you to control airflow and effectively manage humidity and condensation in wet conditions without letting the rain in
  • In wet conditions, set up the rainfly first to keep the inner tent and your gear dry; do the reverse when packing up
  • Rainfly can be rolled up to the Tension Ridge for stargazing, then deployed quickly and secured from inside the tent when needed
  • The Lightbar™ pole storage sack can be mounted at the tent peak; slide in a headlamp or 2 and its semi-rigid, translucent material delivers soft illumination to the whole tent
  • High tent door allows for easy entry and exit, and better views of the outside when you're within
  • Machined aluminum clips—more durable than plastic—attach the pole to the inner foot with ease
  • 9 Ground Control Light tent stakes, made from 7075-T6 hardened aluminum, have a multi-notch design that helps you to attach the tent close to the ground, even in hard terrain
  • Adjustable peg-out points at each corner and on the doors give you flexibility with where you place your stakes
  • 4 Ground Control guylines can be attached or removed as needed with quick-connect V-toggles; easily control their length with integrated adjusters
  • The 3-piece, modular FairShare storage sack system allows you to easily split the load with a friend; after setup, the stuff sacks transform into gear storage pockets
  • The combination of DAC Featherlite NSL and Pressfit pole segments with varying diameters maximizes strength while minimizing weight
  • Optional accessories (not included): gear loft for additional storage; 2 footprint options


View all Sea to Summit Backpacking Tents

Technical Specs

Item #189383
Best Use




Sleeping Capacity


Minimum Trail Weight

2 lbs. 1 oz.

Fly / Footprint Pitch Weight

1 lb. 11.3 oz.

Packaged Weight

2 lbs. 7.2 oz.

Packed Size

4.3 x 17.7 inches

Floor Dimensions

84.5 x 42/24 (L x W head/foot) inches

Floor Area

19.5 square feet

Vestibule Area

7.5 square feet

Peak Height

42.5 inches

Number of Doors

1 door

Number of Poles


Pole Material

Aluminium DAC TH72M

Pole Diameter

8.7/9.5 millimeters

Canopy Fabric

15-denier polyester mesh

Floor Fabric

15-denier ripstop nylon

Rainfly Fabric

15-denier ripstop nylon

Footprint Included




Design Type


14 reviews with an average rating of 4.2 out of 5 stars

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