Hyperlite Mountain Gear Flat Tarp 8.5x8.5 vs Six Moon Designs Lunar Duo
Weight and specs compared for 2026 — and which one to choose.
8.5-foot square ultralight tarp with Dyneema Composite Fabric. Waterproof and sag-free construction.
Full details →Spacious 2-person trekking pole shelter with side entry.
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Hyperlite Mountain Gear Flat Tarp 8.5x8.5 vs Six Moon Designs Lunar Duo: which should you buy?
If saving weight is your priority, the Hyperlite Mountain Gear Flat Tarp 8.5x8.5 wins — at 255 g it is 595 g (70%) lighter than the Six Moon Designs Lunar Duo (850 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.
See where both rank against everything else in this category on the lightest shelter page, or browse the full gear weight database.