MSR Sweetwater Microfilter

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The Sweetwater Microfilter is MSR's fastest-pumping filter. It provides a fast, dependable way to filter your water, and only adds 320gms to your backpack. This MSR water filter's lever-action pumps water on both up and down strokes for a fast 1.25-litres-per-minute flow rate, and the filter eliminates 99.99% of all waterborne bacteria and common protozoan parasites like giardia and cryptosporidia.

Simple brushing restores a clogged filter, and the pump lets you know when the filter needs replacing (after about 750 litres). Fold the handle down and slip the 19cm x 5cm SweetWater Microfilter into the included stuff sack. Simple lightweight and versatile it�s the perfect water treatment option for light to moderate use with the capacity to easily step-up to the demands of the occasional big trip

Perfect for Fast & Light use.  ...If you're after simplicity, don't mind pumping for instant water and want a filter thats light and extremely compact, go for the MSR Sweetwater Microfilter.

Features:
* Iodine-free - Inactivates viruses without bad-tasting iodine.
* Fast - Pump at a fast flow rate of 1.25 liters per minute, then add five drops of the purifier solution per liter and wait five minutes for optimal protection.
* Easy to Use - Lever-action pump handle has a 4-to-1 mechanical advantage and dual pump action, so you don�t have to work as hard.
* Lightweight - Entire system weighs just 320 gms
* Compact - Handle folds flat when not in use for easy packing and storage. 19cm x 5cm
* Dependable - Inactivates 99.99% of waterborne viruses; eliminates over 99.9999% of all waterborne bacteria and 99.9% of common protozoan parasites, such as giardia and cryptosporidia, as well as particulates, bad tastes, and odors.

Effective Against
* Protozoa = Yes
* Bacteria = Yes
* Viruses = No
* Particulate = Yes
* Chemicals/Toxins (taste/odour) = Yes 

Performance
* Flow(litres per minute) 1+ Litres per min
* Flow (Strokes per litre) 70-80
* Cartridge life 750 litres
* Field-cleanable = Yes
* Field-maintainable = No