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Sea to Summit Alto TR2 vs Six Moon Designs Lunar Duo

Weight and specs compared for 2026 — and which one to choose.

No winner on weight yet. The recorded weights have not both been verified on the same basis. Size, included parts and single-item versus pair weights can differ. Check the linked sources before choosing a replacement.

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Spec Sea to Summit Alto TR2 Six Moon Designs Lunar Duo
Weight 1,156 g · 1.156 kg · 2.55 lb
TR2 mesh-inner version; minimum trail weight; packed weight is 1340 g
 1,270 g · 1.270 kg · 2.80 lb
as listed; tent with stuff sacks and guy lines, excl. stakes and poles
Brand Sea to Summit Six Moon Designs
Category Shelter Shelter
Sea to Summit Alto TR2
1,156 g

Ultralight 2-person tent with tension ridge architecture.

See it in your base weight → Full details →
Six Moon Designs Lunar Duo
1,270 g

Spacious 2-person trekking pole shelter with side entry.

See it in your base weight → Full details →

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Sea to Summit Alto TR2 vs Six Moon Designs Lunar Duo: which should you buy?

The listed weights alone are not enough to choose between these products. Confirm the size, included parts and weight basis against each source; choose equipment for the function and fit you need.

See where both rank against everything else in this category on the lightest shelter page, or browse the full gear weight database.

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