Rab Mythic Ultra 360 (22°F) vs Zpacks Zip Around Sleeping Bag 20°F
Weight and specs compared for 2026 — and which one to choose.
Spring/fall sleeping bag at 21.4 oz (606g) with 900-fill hydrophobic European goose down and integrated thermal liner technology.
Full details →900-fill down sleeping bag with full-length side zipper for easy entry and temperature regulation. Rated to -7°C, excellent for thru-hikers seeking packable, ve...
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Rab Mythic Ultra 360 (22°F) vs Zpacks Zip Around Sleeping Bag 20°F: which should you buy?
If saving weight is your priority, the Rab Mythic Ultra 360 (22°F) wins — at 606 g it is 6 g (1%) lighter than the Zpacks Zip Around Sleeping Bag 20°F (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.