REI Co-op Magma 15 vs Sea to Summit Aeros Ultralight Pillow (Regular)

Weight and specs compared for 2026 — and which one to choose.

Sea to Summit Aeros Ultralight Pillow (Regular) is the lighter option — 790 g lighter than the REI Co-op Magma 15 (93% less weight). If grams matter to you, that is the one to beat.

Spec	REI Co-op Magma 15	Sea to Summit Aeros Ultralight Pillow (Regular)
Weight	850 g · 0.850 kg · 1.87 lb	60 g · 0.060 kg · 0.13 lb
Brand	REI Co-op	Sea to Summit
Category	Sleep System	Sleep System

REI Co-op Magma 15

850 g

850-fill down sleeping bag rated to 15°F. Great value.

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Sea to Summit Aeros Ultralight Pillow (Regular)

60 g

Inflatable ultralight camp pillow with a curved synthetic-fill surface and multi-function valve for comfort.

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REI Co-op Magma 15 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 790 g (93%) lighter than the REI Co-op Magma 15 (850 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.

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