Cairngorm Treks Review - Sawyer International Select S1 Foam Filter
Posted by Cairngorm Treks on Sep 10, 2018
We take water treatment very seriously and have seen first-hand the
effects that water born illnesses can have. On first inspection,the
Sawyer Select Series appears to push further than any non-mechanical
water filtration system we have used before, so we were eager to see how
it faired against our usual choice. Made as three separate models, the
S1, S2 and S3, all of which combine two k
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