Sea to Summit Ember XT 0°C Sleeping Bag vs Therm-a-Rest Parsec 20F
Weight and specs compared for 2026 — and which one to choose.
Ultralight 0°C rated bag with 850+ UltraDry Down insulation. Stretch-knit lining and sculpted hood for packability and comfort.
Full details →Updated 2026 ultralight 3-season sleeping bag with 900-fill Muscovy hydrophobic down. Comfort rating -6°C. Refined baffles for improved loft and simplified inte...
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Sea to Summit Ember XT 0°C Sleeping Bag vs Therm-a-Rest Parsec 20F: which should you buy?
If saving weight is your priority, the Sea to Summit Ember XT 0°C Sleeping Bag wins — at 609 g it is 211 g (26%) lighter than the Therm-a-Rest Parsec 20F (820 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.