Sea to Summit Ember Sleeping Bag vs Therm-a-Rest Vesper 32°F Sleeping Bag
Weight and specs compared for 2026 — and which one to choose.
Three-season sleeping bag with 850+ UltraDry hydrophobic down, 5.1L pack size, and a rectangular zipper profile for comfort. Men's regular size.
Full details →Premium ultralight sleeping bag with 900-fill hydrophobic goose down. Rated to 32°F (0°C) with mummy fit and draft collar for warmth retention.
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Sea to Summit Ember Sleeping Bag vs Therm-a-Rest Vesper 32°F Sleeping Bag: which should you buy?
If saving weight is your priority, the Therm-a-Rest Vesper 32°F Sleeping Bag wins — at 550 g it is 59 g (10%) lighter than the Sea to Summit Ember Sleeping Bag (609 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.