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Rab Mythic Alpine Light Jacket vs REI Co-op Magma 850 Down Jacket

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

Rab Mythic Alpine Light Jacket is the lighter option — 118 g lighter than the REI Co-op Magma 850 Down Jacket (32% less weight). If grams matter to you, that is the one to beat.
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Spec Rab Mythic Alpine Light Jacket REI Co-op Magma 850 Down Jacket
Weight 252 g · 0.252 kg · 0.56 lb 370 g · 0.370 kg · 0.82 lb
Brand Rab REI Co-op
Category Clothing - Mid Layer Clothing - Mid Layer
Rab Mythic Alpine Light Jacket
252 g

900 fill power goose down with PrimaLoft Gold, 8.8oz, ultralight insulation jacket

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REI Co-op Magma 850 Down Jacket
370 g

Responsible down 850-fill jacket at excellent value.

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Rab Mythic Alpine Light Jacket vs REI Co-op Magma 850 Down Jacket: which should you buy?

If saving weight is your priority, the Rab Mythic Alpine Light Jacket wins — at 252 g it is 118 g (32%) lighter than the REI Co-op Magma 850 Down Jacket (370 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 clothing - mid layer page, or browse the full gear weight database.

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