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MSR Thru-Link Inline Microfilter vs SteriPen Adventurer Opti

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

MSR Thru-Link Inline Microfilter is the lighter option — 20 g lighter than the SteriPen Adventurer Opti (22% less weight). If grams matter to you, that is the one to beat.
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Spec MSR Thru-Link Inline Microfilter SteriPen Adventurer Opti
Weight 70 g · 0.070 kg · 0.15 lb 90 g · 0.090 kg · 0.20 lb
Brand MSR SteriPen
Category Hygiene Hygiene
MSR Thru-Link Inline Microfilter
70 g

Inline 0.2-micron hollow-fiber filter with activated carbon that integrates into hydration reservoirs for on-the-move filtering.

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SteriPen Adventurer Opti
90 g

UV water purifier. Purifies 1L in 90 seconds.

Full details →

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MSR Thru-Link Inline Microfilter vs SteriPen Adventurer Opti: which should you buy?

If saving weight is your priority, the MSR Thru-Link Inline Microfilter wins — at 70 g it is 20 g (22%) lighter than the SteriPen Adventurer Opti (90 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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