REI Co-op Magma 15 vs Therm-a-Rest NeoAir XLite NXT

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

Therm-a-Rest NeoAir XLite NXT is the lighter option — 496 g lighter than the REI Co-op Magma 15 (58% less weight). If grams matter to you, that is the one to beat.

Spec	REI Co-op Magma 15	Therm-a-Rest NeoAir XLite NXT
Weight	850 g · 0.850 kg · 1.87 lb	354 g · 0.354 kg · 0.78 lb
Brand	REI Co-op	Therm-a-Rest
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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Therm-a-Rest NeoAir XLite NXT

354 g

Ultralight inflatable sleeping pad with R-value 4.5.

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REI Co-op Magma 15 vs Therm-a-Rest NeoAir XLite NXT: which should you buy?

If saving weight is your priority, the Therm-a-Rest NeoAir XLite NXT wins — at 354 g it is 496 g (58%) 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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