Sea to Summit Spark 30 Sleeping Bag vs Yamatomichi UL Pad 100cm
Weight and specs compared for 2026 — and which one to choose.
Ultralight 30°F mummy bag filled with 850+ loft down. Differential cut and ripstop shell deliver excellent warmth-to-weight ratio.
Full details →Ultralight closed-cell foam sleeping pad, 100cm length, one of the world's lightest sleep pads at just 75g with minimalist ultralight design
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Sea to Summit Spark 30 Sleeping Bag vs Yamatomichi UL Pad 100cm: which should you buy?
If saving weight is your priority, the Yamatomichi UL Pad 100cm wins — at 75 g it is 407 g (84%) lighter than the Sea to Summit Spark 30 Sleeping Bag (482 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 sleep system page, or browse the full gear weight database.