![Click to enlarge](https://sep.yimg.com/ca/I/purstore_2229_732741) ![](https://sep.yimg.com/ca/Img/trans_1x1.gif) ![Exstream Carbon Replacment Prefilter 2-Pack](https://sep.yimg.com/ca/I/purstore_2229_739934)
The Exstream® Prefilter™ attaches to the bottom of your ViruStat microbial water purification cartridge. The activated coconut carbon granules reduce pesticides and herbicides while removing sediment & organic contaminants that create unpleasant tastes and odors. A must for extended travel in regions with questionable water quality.
Extends the life of the cyst filter & removes impurities that cause unpleasant water taste.
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