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Katadyn BeFree AC Filter vs Outdoor Research Adrenaline Rain Pants

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

Katadyn BeFree AC Filter is the lighter option — 225 g lighter than the Outdoor Research Adrenaline Rain Pants (78% less weight). If grams matter to you, that is the one to beat.
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Spec Katadyn BeFree AC Filter Outdoor Research Adrenaline Rain Pants
Weight 65 g · 0.065 kg · 0.14 lb 290 g · 0.290 kg · 0.64 lb
Brand Katadyn Outdoor Research
Category Miscellaneous Miscellaneous
Katadyn BeFree AC Filter
65 g

Hollow-fiber filter in a collapsible soft flask with optional activated carbon for taste improvement. Fast 2L/min flow rate and ultralight for on-the-go hydrati...

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Outdoor Research Adrenaline Rain Pants
290 g

Lightweight waterproof rain pants with full-length zip.

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Katadyn BeFree AC Filter vs Outdoor Research Adrenaline Rain Pants: which should you buy?

If saving weight is your priority, the Katadyn BeFree AC Filter wins — at 65 g it is 225 g (78%) lighter than the Outdoor Research Adrenaline Rain Pants (290 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 miscellaneous page, or browse the full gear weight database.

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