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Grayl GeoPress Purifier vs MSR Guardian Purifier Pump
Weight and specs compared for 2026 — and which one to choose.
Grayl GeoPress Purifier is the lighter option — 40 g lighter than the MSR Guardian Purifier Pump (8% less weight). If grams matter to you, that is the one to beat.
Grayl GeoPress Purifier
450 g
Press-style 24oz bottle that purifies virus, bacteria and protozoa from any freshwater source in about eight seconds.
Check price Full details →MSR Guardian Purifier Pump
490 g
Military-grade water purifier removes viruses, bacteria and protozoa.
Full details →Grayl GeoPress Purifier vs MSR Guardian Purifier Pump: which should you buy?
If saving weight is your priority, the Grayl GeoPress Purifier wins — at 450 g it is 40 g (8%) lighter than the MSR Guardian Purifier Pump (490 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 hygiene page, or browse the full gear weight database.
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