Hyperlite Mountain Gear 20 Degree Mummy Sleeping Bag vs Sea to Summit Aeros Ultralight Pillow (Regular)
Weight and specs compared for 2026 — and which one to choose.
New-for-2026 ultralight mummy sleeping bag with 16.7 oz of 1000 fill power down in ultralight 7D nylon shell. Temperature rating 20°F (-6°C). Designed for cold-...
Full details →Inflatable ultralight camp pillow with a curved synthetic-fill surface and multi-function valve for comfort.
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Hyperlite Mountain Gear 20 Degree Mummy Sleeping Bag vs Sea to Summit Aeros Ultralight Pillow (Regular): which should you buy?
If saving weight is your priority, the Sea to Summit Aeros Ultralight Pillow (Regular) wins — at 60 g it is 643 g (91%) lighter than the Hyperlite Mountain Gear 20 Degree Mummy Sleeping Bag (703 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.