Mountain Hardwear Stretch Ozonic Rain Jacket vs Outdoor Research Helium UL Jacket
Weight and specs compared for 2026 — and which one to choose.
Men's stretch-fabric rain jacket at 10.7 oz (304g) with 4-way stretch for climbing and active movement, waterproof and breathable.
Full details →Minimalist rain jacket with Toray Dermizax 2.75-layer 15D construction, highly breathable and compressible for fast-and-light mountain use.
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Mountain Hardwear Stretch Ozonic Rain Jacket vs Outdoor Research Helium UL Jacket: which should you buy?
If saving weight is your priority, the Outdoor Research Helium UL Jacket wins — at 162 g it is 142 g (47%) lighter than the Mountain Hardwear Stretch Ozonic Rain Jacket (304 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.