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OMM waterproof Kamleika Cap vs Outdoor Research Helium Rain Jacket

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

OMM waterproof Kamleika Cap is the lighter option — 170 g lighter than the Outdoor Research Helium Rain Jacket (85% less weight). If grams matter to you, that is the one to beat.
Spec OMM waterproof Kamleika Cap Outdoor Research Helium Rain Jacket
Weight 30 g · 0.030 kg · 0.07 lb 200 g · 0.200 kg · 0.44 lb
Brand OMM Outdoor Research
Category Clothing - Outer Layer Clothing - Outer Layer
OMM waterproof Kamleika Cap
30 g
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Outdoor Research Helium Rain Jacket
200 g

Ultralight packable waterproof jacket. Award-winning design.

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OMM waterproof Kamleika Cap vs Outdoor Research Helium Rain Jacket: which should you buy?

If saving weight is your priority, the OMM waterproof Kamleika Cap wins — at 30 g it is 170 g (85%) lighter than the Outdoor Research Helium Rain Jacket (200 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 - outer layer page, or browse the full gear weight database.

More clothing - outer layer comparisons