OMM waterproof Kamleika Cap vs Outdoor Research Helium UL Rain Jacket

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

OMM waterproof Kamleika Cap is the lighter option — 131 g lighter than the Outdoor Research Helium UL Rain Jacket (81% less weight). If grams matter to you, that is the one to beat.

Spec	OMM waterproof Kamleika Cap	Outdoor Research Helium UL Rain Jacket
Weight	30 g · 0.030 kg · 0.07 lb	161 g · 0.161 kg · 0.35 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 UL Rain Jacket

161 g

2.75-layer ultralight rain jacket with 15-denier Pertex Shield shell. Packs into its own chest pocket. Rated for sustained heavy rain.

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

If saving weight is your priority, the OMM waterproof Kamleika Cap wins — at 30 g it is 131 g (81%) lighter than the Outdoor Research Helium UL Rain Jacket (161 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.

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