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MSR Guardian Purifier Pump vs Sawyer Mini Water Filter

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

Sawyer Mini Water Filter is the lighter option — 437 g lighter than the MSR Guardian Purifier Pump (89% less weight). If grams matter to you, that is the one to beat.
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Spec MSR Guardian Purifier Pump Sawyer Mini Water Filter
Weight 490 g · 0.490 kg · 1.08 lb 53 g · 0.053 kg · 0.12 lb
Brand MSR Sawyer
Category Hygiene Hygiene
MSR Guardian Purifier Pump
490 g

Military-grade water purifier removes viruses, bacteria and protozoa.

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Sawyer Mini Water Filter
53 g

Ultralight inline water filter. 100,000-gallon lifetime.

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MSR Guardian Purifier Pump vs Sawyer Mini Water Filter: which should you buy?

If saving weight is your priority, the Sawyer Mini Water Filter wins — at 53 g it is 437 g (89%) 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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