Sea to Summit Spark Pro Down 30 vs UGQ Bandit 20
Weight and specs compared for 2026 — and which one to choose.
Ultralight mummy bag rated to 30F (-1C) with 950+ fill-power Ultra-Dry Down. 10-denier shell, shoulder and footbox zippers for temperature control.
Full details →Customizable ultralight quilt with 900-fill goose down. Overstuffed to 130% for superior warmth.
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Sea to Summit Spark Pro Down 30 vs UGQ Bandit 20: which should you buy?
If saving weight is your priority, the Sea to Summit Spark Pro Down 30 wins — at 619 g it is 33 g (5%) lighter than the UGQ Bandit 20 (652 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.