Montbell Plasma 1000 vs Rab Mythic Alpine Light Jacket
Weight and specs compared for 2026 — and which one to choose.
Ultralight down jacket with 1000-fill goose down. Men's weighs just 139g with exceptional warmth-to-weight.
Full details →900 fill power goose down with PrimaLoft Gold, 8.8oz, ultralight insulation jacket
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Montbell Plasma 1000 vs Rab Mythic Alpine Light Jacket: which should you buy?
If saving weight is your priority, the Montbell Plasma 1000 wins — at 139 g it is 113 g (45%) lighter than the Rab Mythic Alpine Light Jacket (252 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.