HydraPak UltraFlask+ 500ml vs Sea to Summit Trek and Travel Liquid Hand Wash
Weight and specs compared for 2026 — and which one to choose.
Compressible 500ml soft flask with an integrated fast-flow filter cap. Built for trail running, fastpacking and on-the-move filtering from hydration vests.
Check price Full details →Concentrated liquid hand wash. 89ml biodegradable formula.
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HydraPak UltraFlask+ 500ml vs Sea to Summit Trek and Travel Liquid Hand Wash: which should you buy?
If saving weight is your priority, the HydraPak UltraFlask+ 500ml wins — at 65 g it is 25 g (28%) lighter than the Sea to Summit Trek and Travel Liquid Hand Wash (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.