The cartridge itself is less than two ounces (their spec, it seems accurate). At a minimum you also need a raw water bag and a connecting hose long enough to gain gravity for good flow. Everything after the filter is optional.

Cheers,

Originally Posted By OldScout
Heck, they weigh the same as my MSR Miniworks which seems strange. It looks like it ought to weigh less. Is the filter heavy or the bags or both? I was looking for a lighter weight alternative to my Miniworks and to my Micropurs.
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--Rick