Outdoor Research Helium UL Rain Jacket vs Rab Kinetic Alpine 2.0
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.
Check price Full details →Stretch waterproof hardshell using Proflex membrane fabric for a soft, breathable feel with a helmet-compatible hood.
Check price Full details →Outdoor Research Helium UL Rain Jacket vs Rab Kinetic Alpine 2.0: which should you buy?
If saving weight is your priority, the Outdoor Research Helium UL Rain Jacket wins — at 161 g it is 174 g (52%) lighter than the Rab Kinetic Alpine 2.0 (335 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.