OMM waterproof Kamleika Cap vs Outdoor Research Helium UL Rain Jacket
Weight and specs compared for 2026 — and which one to choose.
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.