Zpacks Classic 20°F Sleeping Bag vs Zpacks Zip Around Sleeping Bag
Weight and specs compared for 2026 — and which one to choose.
Ultralight mummy sleeping bag with 900-fill power goose down rated to 20°F. Water-resistant down and Dyneema shell. Weighs 20.3 oz in regular size.
Full details →900-fill-power down sleeping bag with unique side-entry zipper. Eliminates the draft collar for a cleaner, lighter design.
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Zpacks Classic 20°F Sleeping Bag vs Zpacks Zip Around Sleeping Bag: which should you buy?
If saving weight is your priority, the Zpacks Classic 20°F Sleeping Bag wins — at 576 g it is 36 g (6%) lighter than the Zpacks Zip Around Sleeping Bag (612 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.